Artificer

Flying Vigilance
Creatures your opponents control with
Ice Counters on them have "this creature can't
attack or block and its activated abilities can't be activated."
{u/r}{u/r}: Artificer deals 3 damage to any of up to
two targets.
{2}{u/r}{t}: Put an ice counter on up to three target creatures, its controller removes the ice counter
at the beginning of their next end step.