Mount for the Miniature

Flying, Mount {w}{g} ({w}{g} Target creature you control switches toughness with this creature until either creature leaves the battlefield.)
Whenever a creature you control with toughness 2 or less dies put a +0/+1 counter on Mount for the Miniature.
Whenever a creature with toughness 3 or more dies put a -0/-1 counter on Mount for the Miniature.