Souls For Silk

At the beginning of your end step, you may exile
a creature card from a graveyard. When you
do, create a Cocoon token. It's an artifact with
vanishing 1, "{t}, Sacrifice this artifact: Gain 1
life and add {w} or {b}. " and "When the last time
counter is removed from this, create a white and
black 2/2 Spirit Insect token with flying."
A small price to pay for the moth's blessing.