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.

Spell Blast

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

Recall

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

Disenchant

Divine Offering

Destroy target artifact. You gain life equal to its mana value.

Serra Angel

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

Scrubland

Counterspell

Wrath of God

Destroy all creatures. They can't be regenerated.

Mahamoti Djinn

Flying (This creature can't be blocked except by creatures with flying or reach.)

Plains

Swords to Plowshares

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

Alabaster Potion

Choose one —
• Target player gains X life.
• Prevent the next X damage that would be dealt to any target this turn.

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.

Fellwar Stone

{T}: Add one mana of any color that a land an opponent controls could produce.

Tundra

Demonic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Balance

Each player chooses a number of lands they control equal to the number of lands controlled by the player who controls the fewest, then sacrifices the rest. Players discard cards and sacrifice creatures the same way.

Control Magic

Enchant creature
You control enchanted creature.

Stasis

Players skip their untap steps.
At the beginning of your upkeep, sacrifice Stasis unless you pay {U}.

Boomerang

Return target permanent to its owner's hand.

Blue Elemental Blast

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

Flood

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

Island

Jayemdae Tome

Sol Ring

Braingeyser

Underground Sea

Time Elemental

When Time Elemental attacks or blocks, at end of combat, sacrifice it and it deals 5 damage to you.
{2}{U}{U}, {T}: Return target permanent that isn't enchanted to its owner's hand.