Ronin, Shadow Stalker (Marvel Super Heroes)

Legendary Creature Ñ Human Rogue Hero - Pay 2 life: Add two mana of any one color. Spend this mana only to cast Equipment spells or activate equip abilities. Activate only once each turn.
{T}, Sacrifice an Equipment attached to Ronin: Target creature gets -4/-4 until end of turn. Activate only as a sorcery.