Skrelv, Defector Mite (SLD-1926) - Secret Lair Drop / Plankton, Tiny Tyrant (Borderless)

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)
Skrelv can't block.
{W/P}, : Choose a color. Another target creature you control gains toxic 1 and hexproof from that color until end of turn. It can't be blocked by creatures of that color this turn. ({W/P} can be paid with either or 2 life.)