Regrowth

Return target card from your graveyard to your hand.

Timetwister

Each player shuffles their hand and graveyard into their library, then draws seven cards. (Then put Timetwister into its owner's graveyard.)

Air Elemental

Mox Pearl

Savannah

Fireball

This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.

Mox Sapphire

Ancestral Recall

Mishra's Factory

{T}: Add {C}.
{1}: Mishra's Factory becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land.
{T}: Target Assembly-Worker creature gets +1/+1 until end of turn.

Mana Drain

Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value.

Island

Winter Orb

As long as Winter Orb is untapped, players can't untap more than one land during their untap steps.

Sol Ring

Swords to Plowshares

Exile target creature. Its controller gains life equal to its power.

Tropical Island

Disenchant

Sage of Lat-Nam

Tundra

Icy Manipulator

{1}, {T}: Tap target artifact, creature, or land.

Plains

Su-Chi

City of Brass

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

Mana Vault

Mana Vault doesn't untap during your untap step.
At the beginning of your upkeep, you may pay {4}. If you do, untap Mana Vault.
At the beginning of your draw step, if Mana Vault is tapped, it deals 1 damage to you.
{T}: Add {C}{C}{C}.

Birds of Paradise

Recall

Discard X cards, then return a card from your graveyard to your hand for each card discarded this way. Exile Recall.

Serra Angel

Flying
Vigilance (Attacking doesn't cause this creature to tap.)

Counterspell

Relic Barrier

Library of Alexandria

{T}: Add {C}.
{T}: Draw a card. Activate only if you have exactly seven cards in hand.