This card gives a creature +0/-9,999 which, unless something very strange has happened, is going to kill pretty much anything
Top Commons for Grixis Control This deck is split between card draw, removal, and lands, with a small smattering of win conditions (you do eventually have to win the game)
You don't choose a target for Hydra Trainer's first ability at the time it triggers
The Job Systems, for instance, have made the jump, but behave differently from the Classes featured in the Dungeons & Dragons set from a few years back
// Tamiyo, Seasoned Scholar Legendary Planeswalker Tamiyo 2 +2: Until your next turn, whenever a creature attacks you or a planeswalker you control, it gets -1/-0 until end of turn