Chungus, Myr Shaper

Defender (This creature can't block.)
Reach (This creature can block creatures with flying.)
{1}: This creature loses defender and gains +2/+0
until end of turn.
{3}: Myr you control get +2/+3 and gain reach
until end of turn, play this as an interrupt.
Do the Myr not realize that this is Big Chungus?