This brilliant loop turns the graveyard into your personal command zone for a Knight, fueled by the staggering discount of Puresteel Paladin's metalcraft ability. Once you control three or more artifacts, the Paladin's static ability slashes the equip cost of Lotus Ring to zero, allowing you to instantly strap the Ring to your chosen Knight without spending a drop of mana. You then exploit the Ring's activated ability to sacrifice that Knight for a surge of three colored mana, sending it to the graveyard where Haakon, Stromgald Scourge's passive ability steps in to let you recast it directly from the yard. Meanwhile, Frostcliff Siege can either pump your attackers with its Temur mode or turn every iteration into a card-drawing machine if you chose Jeskai.