Karn, Silver Golem (Oversized) [Commander's Arsenal Oversized] Legendary Artifact whenever a creature an opponent

whenever a creature an opponent controls blocks

Set: Limited Edition Alpha Type: Instant Rarity: Uncommon Cost: {U} Cast this spell only during an opponent's turn

then put them on top of it in any order

put them onto the battlefield

+1: Put three +1/+1 counters on up to one target noncreature land you control

Karn, Silver Golem (Oversized) [Commander's Arsenal Oversized] Legendary Artifact whenever a creature an opponentSet: Commander's Arsenal Oversized Type: Legendary Artifact Creature Golem Rarity: Rare Cost: {5} Whenever Karn, Silver Golem blocks or becomes blocked, it gets 4 +4 until end of turn. {1}: Target noncreature artifact becomes an artifact creature with power and toughness each equal to its converted mana cost until end of turn.