Chiron Infidel

When Chiron Infidel enters the battlefield, gain
X life counters and lose X life where X is half
your life total rounded up.
Instead of drawing, you may choose to exile the
top card of your library. You may cast cards
exiled in this way without paying their mana
costs if their cmc is less than the amount of life
counters you control.
{p/b}{p/r}: Remove 1 life counter