Gold

Enchant target creature. For every creature
you kill, get 1 gold counter.
If the enchanted creature kills another creature, instead, get 2 gold counters
Spend 2 gold counter to get a Tango token artifact.
Spend 3 gold counters to get a Clarity token artifact
or Healing Salve token artifact.
Spend 5 gold counters to get a Boots of Travel token equipment.