Saint Traft and Rem Karolus [MOC-9]

Whenever Saint Traft and Rem Karolus becomes tapped, create a 1/1 red Human creature token if this is the first time this ability has resolved this turn. If it's the second time, create a 1/1 blue Spirit creature token with flying. If it's the third time, create a 4/4 white Angel creature token with flying. Whenever you cast a spell that has convoke, untap Saint Traft and Rem Karolus.