Garrium, Soul-Boggler

Whenever a player shuffles their library, exile
the top card of it. Until your next end step you
may look at and cast that card and you may
spend mana as though it were mana of any type
to do so.
Whenever Garrium, Soul-Boggler deals damage
to a player, that player shuffles their library.
"Your life is of little use to me, but traumatic memories
make for such excellent decoration."