Fiendsmith's Agnumday

2+ monsters, including a LIGHT Fiend monsterOnce per turn (Quick Effect): You can target 1 LIGHT non-Link Fiend monster in your GY; Special Summon it, and if you do, equip this card you control to that monster as an Equip Spell with the following effects. ● The equipped monster gains ATK equal to the total Link Rating of Link Monsters equipped to it x 600. ● If the equipped monster attacks a Defense Position monster, inflict piercing battle damage to your opponent.