Your search for "Resource R-021" revealed the following:
Resource (R-021) (C+) (Alternate Art) - R-021 - Common+ from GD-03 Booster Pack: Steel Requiem, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: kenko
Resource (R-021) - R-021 - Common from GD-03 Booster Pack: Steel Requiem, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: kenko Card Text:(Rest a Resource when paying a cost.)
Resource (RP-021) (Mobile Suit Gundam: Hathaway's Flash) - RP-021 - Promo from Gundam Promotional Resource Tokens, available at 401 Games Canada. Rarity: Promo Finish: Foil Artist: TONJI MATSUNO Card Text:(Rest a Resource when paying a cost.)
Resource (R-011) (C+) (Alternate Art) - R-011 - Common+ from GD-02 Booster Pack: Dual Impact, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: Robographer Card Text:(Rest a Resource when paying a cost.)
Resource (R-002) (C++) (Alternate Art) - R-002 - Common++ from GD-01 Booster Pack: Newtype Rising, available at 401 Games Canada. Rarity: Common++ Finish: Foil Artist: kenko Card Text:(Rest a Resource when paying a cost.)
Resource (R-031) (C+) (Alternate Art) - R-031 - Common+ from GD-04 Booster Pack: Phantom Aria, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: Ryuta Yanagi Card Text:(Rest a Resource when paying a cost.)
Resource (R-012) (C+) (Alternate Art) - R-012 - Common+ from GD-02 Booster Pack: Dual Impact, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: Robographer Card Text:(Rest a Resource when paying a cost.)
Resource (R-017) (C+) (Alternate Art) - R-017 - Common+ from GD-02 Booster Pack: Dual Impact, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: Ryuta Yanagi Card Text:(Rest a Resource when paying a cost.)
Resource (R-014) (C+) (Alternate Art) - R-014 - Common+ from GD-02 Booster Pack: Dual Impact, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: Robographer Card Text:(Rest a Resource when paying a cost.)
Resource (R-023) (C+) (Alternate Art) - R-023 - Common+ from GD-03 Booster Pack: Steel Requiem, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: Ryuta Yanagi Card Text:(Rest a Resource when paying a cost.)
Resource (R-013) (C+) (Alternate Art) - R-013 - Common+ from GD-02 Booster Pack: Dual Impact, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: Robographer Card Text:(Rest a Resource when paying a cost.)
Resource (R-018) (C+) (Alternate Art) - R-018 - Common+ from GD-02 Booster Pack: Dual Impact, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: sakusaku sakurai Card Text:(Rest a Resource when paying a cost.)
Resource (R-002) (C+) (Alternate Art) - R-002 - Common+ from GD-01 Booster Pack: Newtype Rising, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: kenko Card Text:(Rest a Resource when paying a cost.)
Resource (R-010) (C+) (Alternate Art) - R-010 - Common+ from GD-02 Booster Pack: Dual Impact, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: sakusaku sakurai Card Text:(Rest a Resource when paying a cost.)
Resource (R-024) - R-024 - Common from GD-03 Booster Pack: Steel Requiem, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: kenko Card Text:(Rest a Resource when paying a cost.)
Resource (RP-001) (Edition Beta BANDAI TCG+ Store Trial Event) - RP-001 - Promo (Foil) from Gundam Promotional Resource Tokens, available at 401 Games Canada. Rarity: Promo Finish: Foil Artist: TONJI MATSUNO Card Text:(Rest a Resource when paying a cost.)
Resource (R-022) (C+) (Alternate Art) - R-022 - Common+ from GD-03 Booster Pack: Steel Requiem, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: kenko Card Text:(Rest a Resource when paying a cost.)
Resource (R-013) - R-013 - Common from GD-02 Booster Pack: Dual Impact, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Robographer Card Text:(Rest a Resource when paying a cost.)
Resource (R-016) (C+) (Alternate Art) - R-016 - Common+ from GD-02 Booster Pack: Dual Impact, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: Ryuta Yanagi Card Text:(Rest a Resource when paying a cost.)
Resource (R-031) - R-031 - Common from GD-04 Booster Pack: Phantom Aria, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Ryuta Yanagi Card Text:(Rest a Resource when paying a cost.)
Resource (R-028) - R-028 - Common from GD-03 Booster Pack: Steel Requiem, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Ryuta Yanagi Card Text:(Rest a Resource when paying a cost.)
Resource (R-028) (C+) (Alternate Art) - R-028 - Common+ from GD-03 Booster Pack: Steel Requiem, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: Ryuta Yanagi Card Text:(Rest a Resource when paying a cost.)
Resource (R-020) (C+) (Alternate Art) - R-020 - Common+ from GD-03 Booster Pack: Steel Requiem, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: kenko Card Text:(Rest a Resource when paying a cost.)
Resource (R-025) (C++) (Alternate Art) - R-025 - Common++ from GD-03 Booster Pack: Steel Requiem, available at 401 Games Canada. Rarity: Common++ Finish: Foil Artist: kenko Card Text:(Rest a Resource when paying a cost.)
Resource (R-025) (C+) (Alternate Art) - R-025 - Common+ from GD-03 Booster Pack: Steel Requiem, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: kenko Card Text:(Rest a Resource when paying a cost.)
Resource (R-029) (C+) (Alternate Art) - R-029 - Common+ from GD-03 Booster Pack: Steel Requiem, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: Ryuta Yanagi Card Text:(Rest a Resource when paying a cost.)
Gundam Lfrith Thorn (R+) (Alternate Art) - GD04-021 - Rare+ from GD-04 Booster Pack: Phantom Aria, available at 401 Games Canada. Rarity: Rare+ Finish: Foil Artist: kenko Card Text:[Breach 3] (When this Unit's attack destroys an enemy Unit, deal the...
Resource (C+) (Alternate Art) (BETA) - R-001 - Common from GD01: Edition Beta, available at 401 Games Canada. Rarity: Common Finish: Foil Card Text:(Rest a Resource when paying a cost.)
Resource (R-030) (C+) (Alternate Art) - R-030 - Common+ from ST-09 Starter Deck: Destiny Ignition, available at 401 Games Canada. Rarity: Common+ Finish: Foil Card Text:(Rest a Resource when paying a cost.)
Resource (R-011) - R-011 - Common from GD-02 Booster Pack: Dual Impact, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Robographer Card Text:(Rest a Resource when paying a cost.)
Resource (R-015) (C++) (Alternate Art) - R-015 - Common++ from GD-02 Booster Pack: Dual Impact, available at 401 Games Canada. Rarity: Common++ Finish: Foil Artist: sakusaku sakurai Card Text:(Rest a Resource when paying a cost.)
Resource (R-008) (C+) (Alternate Art) - R-008 - Common+ from GD-01 Booster Pack: Newtype Rising, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: PLANETA_Yamashita Card Text:(Rest a Resource when paying a cost.)
Resource (R-015) (C+) (Alternate Art) - R-015 - Common+ from GD-02 Booster Pack: Dual Impact, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: sakusaku sakurai Card Text:(Rest a Resource when paying a cost.)
Resource (R-026) (C+) (Alternate Art) - R-026 - Common+ from GD-03 Booster Pack: Steel Requiem, available at 401 Games Canada. Rarity: Common+ Finish: Foil Artist: Ryuta Yanagi Card Text:(Rest a Resource when paying a cost.)