Musk'll, Keeper of Relics

Flying, Indestructible
Whenever a nontoken artifact you control leaves
the battlefield, exile it instead, then draw a card.
{w}{w}{u}, Sacrifice a land: Search your library
for up to three legendary artifact cards with
different names, put one onto the battlefield
tapped and the others into your hand, then
shuffle. Exile Musk'll, Keeper of Relics.