Spooky20

{T}: Add {C}. {T}: Regenerate target Insect, Rat, Spider, or Squirrel. (The next time it would be destroyed, instead tap it, remove it from combat,...

{T}: Add {C}. {1}, {T}: Put a storage counter on Saltcrusted Steppe. {1}, Remove X storage counters from Saltcrusted Steppe: Add X mana in any comb...

{T}: Add {C}. {1}{R}, {T}: Create a 0/1 red Kobold creature token named Kobolds of Kher Keep.

If Gemstone Caverns is in your opening hand and you're not the starting player, you may begin the game with Gemstone Caverns on the battlefield wit...

Exile target creature you control, then return it to the battlefield under its owner's control. Flashback {3}{U} (You may cast this card from your...

{T}: Add {W}. When Flagstones of Trokair is put into a graveyard from the battlefield, you may search your library for a Plains card, put it onto t...

(Dryad Arbor isn't a spell, it's affected by summoning sickness, and it has "{T}: Add {G}.")

{T}: Add {C}. {1}, {T}: Put a storage counter on Dreadship Reef. {1}, Remove X storage counters from Dreadship Reef: Add X mana in any combination ...

{T}: Add {C}. {1}, {T}: Put a storage counter on Calciform Pools. {1}, Remove X storage counters from Calciform Pools: Add X mana in any combinatio...

Indestructible As Stuffy Doll enters the battlefield, choose a player. Whenever Stuffy Doll is dealt damage, it deals that much damage to the chose...

{1}, {T}, Discard a card: Create a 1/1 colorless Sliver artifact creature token named Metallic Sliver.

{T}: Add {C}. {1}, {T}: Add one mana of any color.

As Paradise Plume enters the battlefield, choose a color. Whenever a player casts a spell of the chosen color, you may gain 1 life. {T}: Add one ma...

{T}: Exile Mangara of Corondor and target permanent.

{T}: Choose target permanent you control or suspended card you own. If that permanent or card has a time counter on it, you may remove a time count...

Creatures you control are Slivers in addition to their other creature types.

As Gauntlet of Power enters the battlefield, choose a color. Creatures of the chosen color get +1/+1. Whenever a basic land is tapped for mana of t...

{T}: Add one mana of any color. {T}: Put a charge counter on Coalition Relic. At the beginning of your precombat main phase, remove all charge coun...

As Cloud Key enters the battlefield, choose artifact, creature, enchantment, instant, or sorcery. Spells you cast of the chosen type cost {1} less ...

Clockwork Hydra enters the battlefield with four +1/+1 counters on it. Whenever Clockwork Hydra attacks or blocks, remove a +1/+1 counter from it. ...

{1}, {T}, Sacrifice Chromatic Star: Add one mana of any color. When Chromatic Star is put into a graveyard from the battlefield, draw a card.

Creatures you control have flying, first strike, vigilance, trample, haste, and protection from black and from red.

All Sliver creatures get +1/+1 for each other Sliver on the battlefield.

Sacrifice Saffi Eriksdotter: When target creature is put into your graveyard this turn, return that card to the battlefield.