Xiru, Flame's Beauty

When Xiru enter's the becomes tapped if you
cast it from your hand add {w}{r} to your mana
pool, this mana can only be spent to cast cards
in exile.
At the beginning of your upkeep choose one:
• Burning: deal 2 damage divided up
among any 2 targets, exile the top card of
your library,
• Beauty: gain 2 life, you may play a card
exile b Xiru until end of turn