Mystic Snake

Flash
When Mystic Snake enters, counter target spell.

Worldly Tutor

Search your library for a creature card, reveal it, then shuffle and put the card on top.

Flying
Whenever Xantid Swarm attacks, defending player can't cast spells this turn.

When Uktabi Orangutan enters, destroy target artifact.

Return all creatures to their owners' hands.

Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

{T}: Add {C}.
{T}: Add {G} or {U}. Yavimaya Coast deals 1 damage to you.

Return all green permanents to their owners' hands.

When an opponent casts an instant spell, if Hidden Gibbons is an enchantment, Hidden Gibbons becomes a 4/4 Ape creature.

Each player returns a creature they control to its owner's hand.

{T}, Sacrifice Tormod's Crypt: Exile target player's graveyard.

Counter target spell unless its controller pays {3}.

Whenever you cast a creature spell, you may pay {1}. If you do, return target creature to its owner's hand.

Each player can't cast more than one spell each turn.

At the beginning of each player's upkeep, that player returns a creature they control to its owner's hand.

Return target creature to its owner's hand. Untap up to two lands.

You may return an Island you control to its owner's hand rather than pay this spell's mana cost.
Counter target spell unless its controller pays {1}.