Roiling Chaos

Evince {2}{u}{r}{g} — Haste
Each creature you control gains haste, hexproof,
and "{t}: Regenerate this creature" until end of
turn.
At the beginning of your end step, if Roiling
Chaos is a creature, you may draw X plus 1 cards,
where X is how many creatures entered the battlefield this turn. If you do, discard X
minus 1 cards.