Quick Study

Aether Tunnel

Enchant creature
Enchanted creature gets +1/+0 and can't be blocked.

Dampening Pulse

Creatures your opponents control get -1/-0.

Wall of Lost Thoughts

Defender
When Wall of Lost Thoughts enters the battlefield, target player mills four cards.

Cold-Water Snapper

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Unsummon

Return target creature to its owner's hand.

Snapping Drake

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

Cancel

Witching Well

When Witching Well enters the battlefield, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)
{3}{U}, Sacrifice Witching Well: Draw two cards.

Island

Flood of Tears

Return all nonland permanents to their owners' hands. If you return four or more nontoken permanents you control this way, you may put a permanent card from your hand onto the battlefield.