Eightfold Maze [Portal Three Kingdoms] Dominaria United Commander Then that player loses all

Then that player loses all unspent mana and you add the mana lost this way

Unrivaled Ancient attacks

Tap an untapped creature you control: Add one mana of any color

Set: Mystery Booster Type: Creature — Human Cleric Rarity: Uncommon Cost: {W} {T}: Target creature you control gains protection from the color of your choice until end of turn

"Not only a wrecking ball

Eightfold Maze [Portal Three Kingdoms] Dominaria United Commander Then that player loses allSet: Portal Three Kingdoms Type: Instant Rarity: Rare Cost: {2}{W} Cast this spell only during the declare attackers step and only if you've been attacked this step. Destroy target attacking creature.