Avallac'h, The Masked Mage

When Avallac'h enters the battlefield from
anywhere except exile, exile him and create a
Legendary 0/1 white human creature token
named Uma, with hexproof and
"{w}{w}{u}{u}{r}{r}: return Avallac'h to the
battlefield."
Whenever a nontoken creature you control deals
combat damage to a player, you may draw a card.
If that creature is legendary, you may draw an additional card.