Finn, Proteus Mage

Hexproof, Lifelink.
{w}{u}{b}, {t}: Finn, Proteus Mage deals 3 damage
to any target. Add {r}{g} to your mana pool.
Whenever a creature dealt damage by Finn dies,
exile that creature and put a 1/1 blue frog
creature token under that creature's controller.
All is possible with experimentation.