Didn't Say Please

Counter target spell. Its controller mills three cards.

Counterspell

Arcane Sanctum

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

Clear the Mind

Target player shuffles their graveyard into their library.
Draw a card.

Tidehollow Strix

Flying
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Soulcatchers' Aerie

Whenever a Bird is put into your graveyard from the battlefield, put a feather counter on this enchantment.
Bird creatures get +1/+1 for each feather counter on this enchantment.

Healer's Hawk

Flying
Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Swamp

Diabolic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Seaside Haven

{T}: Add {C}.
{W}{U}, {T}, Sacrifice a Bird: Draw a card.

Obelisk of Esper

Baleful Strix

Flying, deathtouch
When this creature enters, draw a card.

Jubilant Skybonder

Flying
Creatures you control with flying have "Spells your opponents cast that target this creature cost {2} more to cast."