The Lord of the Rings: Tales of Middle-earth

Grond, the Gatebreaker | Legendary Artifact | Vehicle | Trample As long as it's your turn and you control an Army, Grond, the Gatebreaker is an artifact creature. Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.) | Ramazan Kazaliev

Mordor Trebuchet | Artifact Creature | Wall | Defender Whenever you attack with one or more Goblins and/or Orcs, create a 2/1 colorless Construct artifact creature token with flying named Ballistic Boulder that's tapped and attacking. Sacrifice that token at end of combat. | Alexander Forssberg