Raiding Roselings

Put thirteen green 1/2 roseling creature tokens
with mutagenic (At the beginning of each battle
phase you may swap power and toughness of this
creatue.) into play under your control.
Flashback {7}{g}{g}(You may cast this card from
your graveyard for its flashback cost. Then exile it.)
Roselings are the result of Than'Quiel's first
experiments with magic. Rumors say they since
were roses of rejected lovers.