Goblin Piledriver [Onslaught] Arcane {1}: Mishra's Factory becomes a

{1}: Mishra's Factory becomes a 2/2 Assembly-Worker artifact creature until end of turn

This effect doesn't remove Red Ward

An opponent chooses two of those cards

Destroy that creature at the beginning of the next end step

The student searches the world for meaning

Goblin Piledriver [Onslaught] Arcane {1}: Mishra's Factory becomes aSet: Onslaught Type: Creature Goblin Warrior Rarity: Rare Cost: {1}{R} Protection from blue (This creature can't be blocked, targeted, dealt damage, or enchanted by anything blue.) Whenever Goblin Piledriver attacks, it gets +2 +0 until end of turn for each other attacking Goblin. Throw enough goblins at any problem and it should go away. At the very least, there'll be fewer goblins.