Managorger Hydra [Magic Origins Prerelease Promos] Plane the mana you spent on

the mana you spent on {X}

and it has "{2}{U}{U}: Return this creature to its owner's hand at the beginning of the next end step

Set: Core Set 2019 Prerelease Promos Type: Creature — Dinosaur Rarity: Rare Cost: {1}{G}{G} Whenever an opponent activates an ability of a creature or land that isn't a mana ability

Xenagos isn't a creature

{2}{G}{G}{G}: Elf creatures you control get +3/+3 and gain trample until end of turn

Managorger Hydra [Magic Origins Prerelease Promos] Plane the mana you spent onSet: Magic Origins Prerelease Promos Type: Creature Hydra Rarity: Rare Cost: {2}{G} Trample Whenever a player casts a spell, put a +1 +1 counter on Managorger Hydra.