Deadeye Navigator

Soulbond was built as a gentle, two-way buff mechanic: pair two creatures when either arrives, share a modest keyword or static bump, lose the bond when either leaves. This takes that framework and bolts an engine to it. The granted ability is not a passive boost but a repeatable flicker, payable at instant speed, that each paired creature has the option to point at itself: exile it, return it under your control, and every arrival effect on that creature resolves anew, every turn, for as long as the bond holds. The crucial detail is that when the paired partner flickers, Deadeye Navigator re-pairs with it the moment it returns, so the bond survives the loop indefinitely. Pair it with something whose re-entry produces more mana than the activation costs, Peregrine Drake or Palinchron being the canonical partners, and the loop closes on itself with no outside pieces: untap enough lands to pay for the next flicker and you have infinite mana, infinite blinks, and a clock running on every trigger you chain through. Drainers and value bodies ride along once the mana engine exists, but they do not start it; the loop needs a creature whose re-entry refills the activation cost. Most repeatable blink effects demand a separate outlet; this one arrives stapled to its own enabler. The 5/5 body is incidental. What matters is an instant-speed flicker living on a permanent, demanding nothing but an unpaired partner to begin and refusing to relinquish the bond once it pairs.