Your search for "Simic Sky Swallower 452" revealed the following:
Simic Sky Swallower - Commander Deck (CMR) from Commander Legends, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: rk post Card Text:Flying, trampleShroud (This creature can’t be the target of spells or abilities.)
Simic Sky Swallower (GK2) from RNA Guild Kit, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: rk post Card Text:Flying, trampleShroud (This creature can't be the target of spells or abilities.)
Simic Sky Swallower (Foil) (DIS) from Dissension, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: rk post Card Text:Flying, trampleSimic Sky Swallower can't be the target of spells or abilities.
Simic Sky Swallower (CMD) from Commander 2011, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: rk post Card Text:Flying, trampleShroud (This creature can't be the target of spells or abilities.)