Nemesis Mask [Darksteel] 061 You can only use each

You can only use each effect of "Proxy F Magician" once per turn

if you Special Summon a "Gogogo" monster(s) (except during the Damage Step): You can Special Summon this card from your Graveyard in face-up Defense Position

then target 1 Level 4 Machine-Type monster in your Graveyard

"Folks 'round here are too in love with their contraptions

Nemesis Mask [Darksteel] 061 You can only use eachSet: Darksteel Type: Artifact Equipment Rarity: Uncommon Cost: {3} All creatures able to block equipped creature do so. Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery. This card enters the battlefield unattached and stays on the battlefield if the creature leaves.)