Gondor Trebuchet

Crew 4 (Tap any number of untapped creatures you control with total power 4 or greater: This permanent becomes an artifact creature until end of turn.)
When Gondor Trebuchet becomes an artifact creature, choose one —
• Gondor Trebuchet deals 2 damage to any
target.
• Destroy target wall.
"Send these foul beasts into the abyss!"