Besieged by the Dragon

Dwarf creatures you control get +1/+1 and have firststrike.
Whenever a creature attacks you or a
planeswalker you control, you may sacrifice a treasure, if you do prevent all combat damage
that creature would deal this turn.
Forge—{r}{w}, {t}: create a Treasure token.
(It's an artifact with "{t}, sacrifice this artifact; add
one mana of any color.")