Teneques, Fallen Knight

First Strike, Menace
Whenever Teneques deals combat damage to a
player, put a betray counter on a creature an
opponent controls and create a colorless artifact
Treasure token with {t}Sacrifice this artifact:
Add one mana of any color to your mana pool.
At the beginning of each upkeep, each creature
with a betray counter deals damage equal to its
power to its controller.