Laktrophi, Forestpirit Guide

Flying, transparency (A creature with transparency
can't be the target of any spells.)
Laktrophi's power and toughness are equal to
the amount of spirit tokens you control.
Whenever you gain life, create a 2/2 white spirit creature token with flying. Then, you may have Laktrophi's power and toughness be X/2 until
end of turn where X is the total power of
spirits you control.