Iennyrrem, Dragon King

0: Sacrifice a creature. Iennyrrem gains loyalty equal to that creature's power or toughness, whichever is higher.
0: Create an X/X dragon token with flying that is the same color as Iennyrrem, where X is Iennyrem's current loyatly.
-15: Put X +1/+1 counters on all creatures you control, where X is the highest power among creatures you control.