Mana Matrix [Legends]Set: Legends Type: Artifact Rarity: Rare Cost: {6} Instant and enchantment spells you cast cost up to {2} less to cast.

Set: Scars of Mirrodin Type: Artifact Rarity: Rare Cost: {4} {8}

Target opponent sacrifices a creature for each black creature you control

Whenever a source deals damage to Phyrexian Obliterator

Set: Fallen Empires Type: Creature — Goblin Shaman Rarity: Common Cost: {R} Sacrifice a Goblin: Regenerate target creature

Set: Modern Masters 2017 Type: Enchantment Rarity: Rare Cost: {1}{R} Whenever you cast an instant or sorcery spell that has the same name as a card in your graveyard

• Prevent all damage target instant or sorcery spell would deal this turn

Set: World Championships 2007 Type: Tool Rarity: Uncommon

If you do and they guessed wrong

You may cast those cards without paying their mana costs

Set: EX: Crystal Guardians Type: Fighting Rarity: Uncommon Retreat cost: Colorless

Set: HeartGold & SoulSilver: Base Set Type: Water Rarity: Promo Retreat cost: Colorless

{2}: Golden Guardian fights another target creature you control