Your search for "hellkite overlord 504" revealed the following:
Hellkite Overlord (ALA) from Shards of Alara, available at 401 Games Canada. Rarity: Mythic Rare Finish: Normal Artist: Justin Sweet Card Text:Flying, trample, hasteR: Hellkite Overlord gets +1/+0 until end of turn.BG: Regenerate Hellkite Overlord.
Hellkite Overlord (2X2) from Double Masters 2022, available at 401 Games Canada. Rarity: Mythic Rare Finish: Normal Artist: Justin Sweet Card Text:Flying, trample, hasteR: Hellkite Overlord gets +1/+0 until end of turn.BG: Regenerate Hellkite Overlord.
Hellkite Overlord (Foil) (DRB) from From the Vault: Dragons, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Justin Sweet Card Text:Flying, trample, hasteR: Hellkite Overlord gets +1/+0 until end of turn.BG: Regenerate Hellkite Overlord.
Hellkite Overlord (Foil) (ALA) from Shards of Alara, available at 401 Games Canada. Rarity: Mythic Rare Finish: Foil Artist: Justin Sweet Card Text:Flying, trample, hasteR: Hellkite Overlord gets +1/+0 until end of turn.BG: Regenerate Hellkite Overlord.
Hellkite Overlord (Etched) (2X2) from Double Masters 2022, available at 401 Games Canada. Rarity: Mythic Rare Finish: Foil Artist: Justin Sweet Card Text:Flying, trample, hasteR: Hellkite Overlord gets +1/+0 until end of turn.BG: Regenerate Hellkite Overlord.
Hellkite Overlord (Foil) (2X2) from Double Masters 2022, available at 401 Games Canada. Rarity: Mythic Rare Finish: Foil Artist: Justin Sweet Card Text:Flying, trample, hasteR: Hellkite Overlord gets +1/+0 until end of turn.BG: Regenerate Hellkite Overlord.
Hellkite Overlord - ALA Reprint (PLST) from The List, available at 401 Games Canada. Rarity: Mythic Rare Finish: Normal Artist: Justin Sweet Card Text:Flying, trample, hasteR: Hellkite Overlord gets +1/+0 until end of turn.BG: Regenerate Hellkite Overlord.