Cyclops, Field Commander

Whenever a human creature enters the battlefield
under your control, exile the top card of your
library and put a charge counter on
Cyclops. You may play cards exiled this way this
turn.
{r}{t}: Deal X damage to any target, where X is
the number of charge counters on Cyclops.
{w}{t}, remove all charge counters from Cyclops:
put a shield counter on each other human
creature you control.