Revel in Riches [Mystery Booster] Demon Gaea was willing to instill

Gaea was willing to instill a portion of her own powers into some of her more vengeful followers

its gigantic head smashed into the mountainside

Threshold — Add {B}{B}{B}{B}{B} instead if seven or more cards are in your graveyard

Players can't pay life or sacrifice creatures to cast spells or activate abilities

Revel in Riches [Mystery Booster] Demon Gaea was willing to instillSet: Mystery Booster Type: Enchantment Rarity: Rare Cost: {4}{B} Whenever a creature an opponent controls dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") At the beginning of your upkeep, if you control ten or more Treasures, you win the game.