Knowledge Pool [Mirrodin Besieged]

Knowledge Pool [Mirrodin Besieged]Set: Mirrodin Besieged Type: Artifact Rarity: Rare Cost: {6} Imprint When Knowledge Pool enters the battlefield, each player exiles the top three cards of their library. Whenever a player casts a spell from their hand, that player exiles it. If the player does, they may cast a spell from among other cards exiled with Knowledge Pool without paying its mana cost.

put that many +1/+1 counters on Tetravus

Reverse Type: Instant Creatures your opponents control get -1/-1 until end of turn

"If you see ghostly lights by the river

Set: Archenemy: Nicol Bolas Type: Creature — Vampire Shaman Rarity: Uncommon Cost: {1}{B}{B} Flying

Monsters Type: Creature — Human Archer Rarity: Uncommon Cost: {R}{W} {1}

No matter what the season

Set: Commander 2016 Type: Legendary Creature — Elf Rogue Rarity: Rare Cost: {1}{G}{U} Whenever a creature deals combat damage to one of your opponents

you may pay {2}{R}

Set: Core Set 2019 Type: Creature — Elemental Horse Rarity: Uncommon Cost: {R}{R} This spell can't be countered

Set: Alpha Edition Type: Artifact Rarity: Uncommon Cost: {2} At the beginning of each player's upkeep

Discard a card: You gain 4 life

Set: Battlebond Type: Creature — Azra Warrior Rarity: Rare Cost: {1}{B} Whenever your opponents are dealt combat damage