K'unara, Echoing Hiss

Gorgons, Hydras, Serpents and Snakes have menace and all those creature types anywhere.
At the beginning of combat on your turn,
target Snake gains Myriad until end of turn.
Whenever one or more Snakes you control deal combat damage to a player put a +1/+1 counter
on target Hydra. Then, if each opponent lost
life this combat, draw a card.