Senuk, master diviner

{g}{u}: until the end of your next turn, whenever
an opponent draws a card, scry 1
{b}{g}: until the end of your next turn, whenever a creature enters an opponents graveyard from anywhere, put a creature from your
graveyard onto the battlefield
{u}{b}: until the end of your next turn, whenever
an opponent activates an ability that isn't a mana ability, that opponent mills 1