mtg.wtf

As an additional cost to cast this spell, pay X life.
All creatures get -X/-X until end of turn.

Infect
{B}: Regenerate Toxic Nim.

Reach, deathtouch
Hypertoxic Miasma — All lands have "{T}: Add one mana of any color" and lose all other abilities.

Whenever a Sliver deals combat damage to a creature, destroy that creature. It can't be regenerated.

At the beginning of each end step, put a slime counter on each creature you don't control.
Creatures you don't control get -1/-1 for each slime counter on them.
Whenever a creature you don't control with a slime counter on it dies, create a 1/1 black Slug creature token.
{U}{B}, Sacrifice a Slug: Draw a card.

Cumulative upkeep—Say "Toy Boat" quickly. (At the beginning of your upkeep, put an age counter on Toy Boat, then sacrifice it unless you say "Toy Boat" once for each age counter on it—without pausing between or fumbling it.)

{G}{G}, {T}: Tracker deals damage equal to its power to target creature. That creature deals damage equal to its power to Tracker.

Target opponent draws two cards, then you draw up to four cards. That opponent may repeat this process as many times as they choose.

Flying
{T}, Tap two untapped creatures you control: Return target permanent to its owner's hand.

{1}, {T}, Discard a card: You gain 4 life.
{1}, {T}, Pay 1 life: Create a 0/1 white Goat creature token.
{1}, {T}, Sacrifice a creature: Return target artifact card from your graveyard to your hand.
{1}, {T}, Sacrifice an artifact: Draw a card.

For each player, you choose from among the permanents that player controls an artifact, a creature, an enchantment, and a planeswalker. Then each player sacrifices all other nonland permanents they control.

Draw two cards. Then discard a card unless you return a land you control to its owner's hand.

Whenever you cast an instant or sorcery spell, investigate.

Target creature can't be blocked this turn.

When Trailblazer's Torch enters the battlefield, you take the initiative.
Whenever equipped creature becomes blocked, it deals 2 damage to each creature blocking it.
Equip {1}

Create two 2/2 white Knight creature tokens with vigilance.

Whenever Trained Cheetah becomes blocked, it gets +1/+1 until end of turn.

Flying
Whenever Trained Condor attacks, another target creature you control gains flying until end of turn.

Training Drone can't attack or block unless it's equipped.

Target creature gets +1/+0, becomes black, and gains shadow until end of turn.
Flashback {1}{B}

Tap target untapped creature. It deals damage equal to its power to its controller.
Conspire

Gain control of target creature until end of turn. Untap it. It gains trample and haste until end of turn.

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. Add two mana of any one color.