Saprazzan Heir

Whenever Saprazzan Heir becomes blocked, you may draw three cards.

Shadow Rift

Target creature gains shadow until end of turn. (It can block or be blocked by only creatures with shadow.)
Draw a card.

Counterspell

Zephyr Falcon

Unstable Mutation

Enchant creature
Enchanted creature gets +3/+3.
At the beginning of the upkeep of enchanted creature's controller, put a -1/-1 counter on that creature.

Boomerang

Return target permanent to its owner's hand.

Sandbar Merfolk

Cycling {2} ({2}, Discard this card: Draw a card.)

Indentured Djinn

Flying
When Indentured Djinn enters, each other player may draw up to three cards.

Lonely Sandbar

Lonely Sandbar enters tapped.
{T}: Add {U}.
Cycling {U} ({U}, Discard this card: Draw a card.)

Cloud Sprite

Flying (This creature can't be blocked except by creatures with flying or reach.)
Cloud Sprite can block only creatures with flying.

Force Spike

Counter target spell unless its controller pays {1}.

Mana Short

Tap all lands target player controls and that player loses all unspent mana.