Zisi, Ruler of the dark side

First bite, Trample, Haste
{u},{t}: If you control an other Shark, yeet (return) target creature to its owners hand.
{b},{t}: Put a -1/-1 counter on target Non-Shark- creature. Destroy the creature, if it is a Human.
Zisi, Ruler of the dark side's strength is double
the numbers of creatures with a -1/-1 counter
on it.