Arkeyan Shield Juggernaut

Arkeyan Shield Juggernaut can attack any time
Whenever Arkeyan Shield Juggernaut attacks, put an indestructible shield counter on it until end of turn.
This prevents any source of damage to this creature for the rest of the turn.
{2}{r}: Instead of putting an indestructible shield counter on Arkeyan Shield Juggernaut when it attacks, put it on other target creature