Illy, Selesnya Swarmkeeper

When Illy, Selesnya Swarmkeeper enters the battlefield, create a 1/1 green Insect creature token, then populate.
{2}{w}: Populate.
{2}{g}: Illy, Selesnya Swarmkeeper gets +X/+X until end of turn, where X is the number of Insect creature tokens you control.