Lone Druid

Whenever Lone Druid enters the battlefield,
create Misha the Bear, a 4/4 green creature token.
{g}{g}{g}: Proliferate.
{3}{g}: Lone Druid is a Bear in addition to its
creature type and gets +X/+X and Trample until
end of turn where X is the power and toughness
of Misha the Bear.