Golden Experience

When Golden Experience enters the battlefield it explores.
Whenever Golden Experience attacks, you may
create a 0/1 white Bird creature token, a 1/1
green Snake token, or a 0/2 green Frog token.
Whenever a token created by Golden Experience
is dealt damage, it deals damage equal to its
toughness to target creature or player.
When Golden Experience dies, if you are at less
than half of your starting life total, transform it.