Waim'atu, One with the Surge

When Waim'atu, One with the Surge enters the battlefield, discard X cards, if you do, draw X
cards and gain X life.
Whenever you cast a spell that targets only a
single creature other than Waim'atu, One with
the Surge, you may have Waim'atu, One with
the Surge gain all abilities of that creature until
end of turn.