Frazino, the Unfallen

First Strike, Vigilance
Upon entering the battlefield, if Frazino, the
Unfallen is the only legendary creature you
control, grant it +3/+3.
{3}{b}{t} : Grant +1/+1 to each other rat you
control. For each legendary rat, give 3
+1/+1 counters to Frazino, the Unfallen instead.