The Snake Lassie

Wandering Monster {5}{b}{g}{g} (Whenever an
opponent casts a creature spell, you may cast this card
as though it had flash by paying {5}{b}{g}{g}.)
When The Snake Lassie enters the battlefield, it
fights target creature. Whenever The Snake Lassie fights, blocks, or becomes blocked, create X 1/1
Snake creature tokens with deathtouch where X
is the Snake Lassies power.
She brings your frienemies.