Crenellations

Cleave {1}{w}{r} (You may cast this for this card's
cleave cost. If you do, remove the words in the square brackets from this spell's rules text.)
Artifacts you control [named Watch Tower,
Town Center, and Castle] gain "{t}: tap up to five
untapped creatures you control with total
toughness 5 or less, they gain indestructible until
the end of turn. Deal 1 damage [plus one for each affected creature] to any target"