Stensia Innkeeper

When Stensia Innkeeper enters, tap target land an opponent controls. That land doesn't untap during its controller's next untap step.

Izzet Guildgate

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

Sea Legs

Flash
Enchant creature
Enchanted creature gets +0/+2 as long as it's a Pirate. Otherwise, it gets -2/-0.

Blazing Volley

Blazing Volley deals 1 damage to each creature your opponents control.

Drag Under

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

Run Aground

Put target artifact or creature on top of its owner's library.

Failed Inspection

Counter target spell. Draw a card, then discard a card.

Mountain

Brute Strength

Target creature gets +3/+1 and gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)

Convolute

Counter target spell unless its controller pays {4}.

Mist-Cloaked Herald

Aether Tradewinds

Return target permanent you control and target permanent you don't control to their owners' hands.

Amphin Pathmage

{2}{U}: Target creature can't be blocked this turn.

Enlightened Maniac

When Enlightened Maniac enters, create a 3/2 colorless Eldrazi Horror creature token.

Unknown Shores

{T}: Add {C}.
{1}, {T}: Add one mana of any color.

Fogwalker

Skulk (This creature can't be blocked by creatures with greater power.)
When Fogwalker enters, target creature an opponent controls doesn't untap during its controller's next untap step.

Totally Lost

Put target nonland permanent on top of its owner's library.

Bloodlust Inciter

{T}: Target creature gains haste until end of turn. (It can attack and {T} this turn.)

Dwindle

Enchant creature
Enchanted creature gets -6/-0.
When enchanted creature blocks, destroy it. (The attacking creature remains blocked.)