Basalt and Beryl Ammunition

Equipped creature gains Reach.
Equipped creature gains "{1}{u/r}, {t}: Basalt
and Beryl Ammunition deals 3 damage to target
creature. Tap that creature and put a Stun counter
on it."
Equip {b/r}{u/b}

Basalt is the Common Stone of Heat, while Beryl is a Prohibiting Gemstone. These bolts negate heat, momentarily setting a small area to a temperature of absolute zero.