Aether Burst

Return up to X target creatures to their owners' hands, where X is one plus the number of cards named Aether Burst in all graveyards as you cast this spell.

Forest

Gaea's Skyfolk

Dimir Guildgate

This land enters tapped.
{T}: Add {U} or {B}.

Mystic Snake

Flash
When Mystic Snake enters, counter target spell.

Capsize

Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)
Return target permanent to its owner's hand.

Yavimaya Coast

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

Simic Guildgate

This land enters tapped.
{T}: Add {G} or {U}.

Withdraw

Return target creature to its owner's hand. Then return another target creature to its owner's hand unless its controller pays {1}.

Snap

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

Recoil

Return target permanent to its owner's hand. Then that player discards a card.

Island

Library of Leng

You have no maximum hand size.
If an effect causes you to discard a card, discard it, but you may put it on top of your library instead of into your graveyard.

Geth's Grimoire

Whenever an opponent discards a card, you may draw a card.

Megrim

Whenever an opponent discards a card, Megrim deals 2 damage to that player.

Repulse

Return target creature to its owner's hand.
Draw a card.

Boomerang

Return target permanent to its owner's hand.

Cognivore

Flying
Cognivore's power and toughness are each equal to the number of instant cards in all graveyards.

Golgari Guildgate

This land enters tapped.
{T}: Add {B} or {G}.

Warped Devotion

Whenever a permanent is returned to a player's hand, that player discards a card.