Tanuki Transplanter

Whenever Tanuki Transplanter or equipped creature attacks, add an amount of {g} equal
to its power. Until end of turn, you don't lose
this mana as steps and phases end.

Reconfigure {3} ({3}: Attach to target creature
you control; or unattach from a creature. Reconfigure only as a sorcery. While attached,
this isn't a creature.)