Lifetap

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

Counterspell

Concentrate

Acid Rain

Unsummon

Return target creature to its owner's hand.

Flood

{U}{U}: Tap target creature without flying.

Darksteel Colossus

Trample, indestructible
If Darksteel Colossus would be put into a graveyard from anywhere, reveal Darksteel Colossus and shuffle it into its owner's library instead.

Barbed Sextant

{1}, {T}, Sacrifice Barbed Sextant: Add one mana of any color. Draw a card at the beginning of the next turn's upkeep.

Boomerang

Return target permanent to its owner's hand.

Island

Hollow Trees

Hollow Trees enters the battlefield tapped.
You may choose not to untap Hollow Trees during your untap step.
At the beginning of your upkeep, if Hollow Trees is tapped, put a storage counter on it.
{T}, Remove any number of storage counters from Hollow Trees: Add {G} for each storage counter removed this way.

Giant Tortoise

Giant Tortoise gets +0/+3 as long as it's untapped.

Black Lotus

{T}, Sacrifice Black Lotus: Add three mana of any one color.

Word of Undoing

Return target creature and all white Auras you own attached to it to their owners' hands.

Urza's Bauble

{T}, Sacrifice Urza's Bauble: Look at a card at random in target player's hand. You draw a card at the beginning of the next turn's upkeep.

Control Magic

Enchant creature
You control enchanted creature.

Prodigal Sorcerer

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

Ray of Erasure

Target player mills a card.
Draw a card at the beginning of the next turn's upkeep.

Conch Horn

{1}, {T}, Sacrifice Conch Horn: Draw two cards, then put a card from your hand on top of your library.