Kird Chieftain gets +1/+1 as long as you control a Forest.: Target creature gets +2/+2 and gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)
, , Sacrifice another creature: Reveal cards from the top of your library until you reveal a nonlegendary creature card. Put that card onto the battlefield and the rest on the bottom of your library in a random order.
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.Genesis Hydra enters with X +1/+1 counters on it.
At the beginning of combat on your turn, if you control each creature on the battlefield with the greatest power, gain control of target creature an opponent controls until end of turn. Untap that creature. It gains haste until end of turn. (It can attack and this turn.)
Jorubai Murk Lurker gets +1/+1 as long as you control a Swamp.: Target creature gains lifelink until end of turn. (Damage dealt by the creature also causes its controller to gain that much life.)