Ekans

Wither & {p/c}{p/c}: Monstrosity 2(Activate this ability
only when you could cast a sorcery. Give this creature
two +1/+1 counters, this ability may only be used
once)
{1}{p/c}{t}: Detain target creature or give target
creature a -1/-1 counter.
After you cast Ekans' Monstrosity it gains
Double Strike & Planeswalk.