Community

Genesis Hydra
Creature — Plant Hydra
When you cast this spell, reveal the top X cards of your library. You may put a nonland permanent card with mana value X or less from among them onto the battlefield. Then shuffle the rest into your library.
This creature enters with X +1/+1 counters on it.
Rulings (6)
If a card in a player's library has X generic mana in its mana cost, X is considered to be 0.
Nov 17, 2017
If "the rest" is zero cards, either because X was 0 or because X was 1 and that card was put onto the battlefield, the library is still shuffled.
Nov 17, 2017
Genesis Hydra's first ability will resolve before Genesis Hydra does. Notably, if you put an Aura card onto the battlefield this way, it can't enchant Genesis Hydra.
Nov 17, 2017
Legality
Formats by platform
Commander
Competitive
Community & retro
Printings (9)
OTC#193$0.41
Outlaws of Thunder Junction Commander
MOC#298$0.41
March of the Machine Commander