Thay-Phaph, the Bladedancer

Whenever a creature is put into a graveyard from
the battlefield, put an Arms counter on
Thay-Phaph.
Equip ability costs cost X less to cast if they target
Thay-Phaph, where X is the amount of Arms counters on Thay-Phaph.
Whenever an Equipment is attached to
Thay-Phaph, Thay-Phaph deals 1 damage to target creature or player.