Jeor Tanu, Shimmering Chaos

Flying, trample
Whenever a player performs an action at random
or exiles cards from their library, Jeor Tanu deals
3 damage to any target and you draw a card and
add one mana of any color.
{u}{r}{r}{g}, {t}: Create Rimnus Tanu, a legendery
6/4 red elemental creature token with overstep,
haste, and "When this creature dies, exile the top
card of your library until you exile a creature.
Put it onto the battlefield and the rest
into the sanctum."