Frostmarsh Spellwielder

Flash
{u}{u}{u}: Until end of turn, each creature you control becomes a copy of Frostmarsh Spellwielder except they do not have this ability and gain all counters on Frostmarsh Spellwielder until end of turn.
{1}{u}: Choose one—
. Put a +1/+1 counter on Frostmarsh Spellwielder
. Put your choice of a hexproof, lifelink, flying, skulk, prowess, vigilance, trample, or shield counter on Frostmarsh Spellwielder
Activate this ability only once each turn.