Mana Leak

Counter target spell unless its controller pays {3}.

Control Magic

Enchant creature
You control enchanted creature.

City of Brass

Whenever City of Brass becomes tapped, it deals 1 damage to you.
{T}: Add one mana of any color.

Quirion Elves

As Quirion Elves enters, choose a color.
{T}: Add {G}.
{T}: Add one mana of the chosen color.

Intruder Alarm

Creatures don't untap during their controllers' untap steps.
Whenever a creature enters, untap all creatures.

Birds of Paradise

Prodigal Sorcerer

{T}: Prodigal Sorcerer deals 1 damage to any target.

Wall of Blossoms

Defender
When Wall of Blossoms enters, draw a card.

Caldera Lake

Caldera Lake enters tapped.
{T}: Add {C}.
{T}: Add {U} or {R}. Caldera Lake deals 1 damage to you.

Force of Will

You may pay 1 life and exile a blue card from your hand rather than pay this spell's mana cost.
Counter target spell.

Sol Ring

Island

Sift

Merfolk Traders

When Merfolk Traders enters, draw a card, then discard a card.

Inspiration

Counterspell

Regrowth

Return target card from your graveyard to your hand.

Prosperity

Forest

Legerdemain

Exchange control of target artifact or creature and another target permanent that shares one of those types with it. (This effect lasts indefinitely.)

Shrieking Drake

Flying
When Shrieking Drake enters, return a creature you control to its owner's hand.

Kaervek's Torch

As long as Kaervek's Torch is on the stack, spells that target it cost {2} more to cast.
Kaervek's Torch deals X damage to any target.

Llanowar Elves

Keeper of the Mind

{U}, {T}: Choose target opponent who has at least two more cards in hand than you do as you activate this ability. Draw a card.

Apprentice Sorcerer

{T}: Apprentice Sorcerer deals 1 damage to any target. Activate only during your turn, before attackers are declared.

Theft of Dreams

Draw a card for each tapped creature target opponent controls.

Rampant Growth

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.