Counterspell

Power Leak

Enchant enchantment
At the beginning of the upkeep of enchanted enchantment's controller, that player may pay any amount of mana. This Aura deals 2 damage to that player. Prevent X of that damage, where X is the amount of mana that player paid this way.

Crystal Rod

Whenever a player casts a blue spell, you may pay {1}. If you do, you gain 1 life.

Power Sink

Counter target spell unless its controller pays {X}. If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana.

Island

Invisibility

Enchant creature
Enchanted creature can't be blocked except by Walls.

Lifetap

Whenever a Forest an opponent controls becomes tapped, you gain 1 life.

Stream of Life

Giant Spider

Reach (This creature can block creatures with flying.)

War Mammoth

Air Elemental

Blue Elemental Blast

Choose one —
• Counter target red spell.
• Destroy target red permanent.

Conservator

{3}, {T}: Prevent the next 2 damage that would be dealt to you this turn.

Wild Growth

Enchant land
Whenever enchanted land is tapped for mana, its controller adds an additional {G}.

Water Elemental

Prodigal Sorcerer

{T}: This creature deals 1 damage to any target.

Feedback

Enchant enchantment
At the beginning of the upkeep of enchanted enchantment's controller, this Aura deals 1 damage to that player.

Wall of Brambles

Defender (This creature can't attack.)
{G}: Regenerate this creature.

Scryb Sprites

Spell Blast

Counter target spell with mana value X. (For example, if that spell's mana cost is {3}{U}{U}, X is 5.)

Nevinyrral's Disk

This artifact enters tapped.
{1}, {T}: Destroy all artifacts, creatures, and enchantments.

Psychic Venom

Enchant land
Whenever enchanted land becomes tapped, this Aura deals 2 damage to that land's controller.

Siren's Call

Cast this spell only during an opponent's turn, before attackers are declared.
Creatures the active player controls attack this turn if able.
At the beginning of the next end step, destroy all non-Wall creatures that player controls that didn't attack this turn. Ignore this effect for each creature the player didn't control continuously since the beginning of the turn.

Regeneration

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
{G}: Regenerate enchanted creature. (The next time that creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Llanowar Elves

Phantasmal Forces

Flying
At the beginning of your upkeep, sacrifice this creature unless you pay {U}.

Shanodin Dryads

Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)

Prevent all combat damage that would be dealt this turn.

Phantasmal Terrain

Enchant land
As this Aura enters, choose a basic land type.
Enchanted land is the chosen type.

Basalt Monolith

This artifact doesn't untap during your untap step.
{T}: Add {C}{C}{C}.
{3}: Untap this artifact.

Tranquility

Creature Bond

Enchant creature
When enchanted creature dies, this Aura deals damage equal to that creature's toughness to the creature's controller.

Drain Power

Target player activates a mana ability of each land they control. Then that player loses all unspent mana and you add the mana lost this way.

Flight

Enchant creature
Enchanted creature has flying.

Lifeforce

Camouflage

Cast this spell only during your declare attackers step.
This turn, instead of declaring blockers, each defending player chooses any number of creatures they control and divides them into a number of piles equal to the number of attacking creatures for whom that player is the defending player. Creatures those players control that can block additional creatures may likewise be put into additional piles. Assign each pile to a different one of those attacking creatures at random. Each creature in a pile that can block the creature that pile is assigned to does so. (Piles can be empty.)

Kudzu

Enchant land
When enchanted land becomes tapped, destroy it. That land's controller may attach this Aura to a land of their choice.

Sea Serpent

This creature can't attack unless defending player controls an Island.
When you control no Islands, sacrifice this creature.

Wall of Wood

Wall of Air

Defender, flying (This creature can't attack, and it can block creatures with flying.)

Merfolk of the Pearl Trident

Braingeyser

Wooden Sphere

Whenever a player casts a green spell, you may pay {1}. If you do, you gain 1 life.

Channel

Until end of turn, any time you could activate a mana ability, you may pay 1 life. If you do, add {C}.

Giant Growth

Target creature gets +3/+3 until end of turn.

Grizzly Bears

Ley Druid

Wanderlust

Enchant creature
At the beginning of the upkeep of enchanted creature's controller, this Aura deals 1 damage to that player.

Forest

Twiddle

You may tap or untap target artifact, creature, or land.

Craw Wurm

Jump

Target creature gains flying until end of turn.

Ironroot Treefolk

Phantom Monster

Wall of Water

Defender (This creature can't attack.)
{U}: This creature gets +1/+0 until end of turn.