Fork Combos
Dual Strike + Fork
Expansion // Explosion + Fork
Rootha, Mercurial Artist + Fork
Twincast + Fork
Errant, Street Artist + Dramatic Reversal + Fork
Combo result
Infinite mana nonland permanents you control can produce. Infinite magecraft triggers. Infinite untap of nonland permanents you control.
Prerequisites
Errant on the battlefield. All other cards in hand. Nonland permanents you control can tap to produce at least {U}. {U}{R}{R} available.
Kalamax, the Stormsire + Chandra's Ignition + Fork
Professor Onyx + Dual Strike + Fork
Combo result
Infinite lifegain. Infinite life loss.
Prerequisites
Professor Onyx on the battlefield. Fork in hand. Dual Strike in hand or foretold from a previous turn. An additional instant or sorcery in hand with the mana available to cast it, or an opponent has cast an as of yet unresolved instant or sorcery spell. If Dual Strike is in hand, {r}{r}{r}{r} available. If Dual Strike was foretold, {r}{r}{r} available.
Professor Onyx + Fork + Expansion // Explosion
Combo result
Infinite lifegain. Infinite life loss.
Prerequisites
Professor Onyx on the battlefield. Fork and Expansion // Explosion in hand. An additional instant or sorcery in hand with the mana available to cast it, or an opponent has cast an as of yet unresolved instant or sorcery spell. {u/r}{u/r}{r}{r} available.
Professor Onyx + Fork + Twincast
Combo result
Infinite lifegain. Infinite life loss.
Prerequisites
Professor Onyx on the battlefield. Twincast and Fork in hand. An additional instant or sorcery in hand with the mana available to cast it, or an opponent has cast an as of yet unresolved instant or sorcery spell. {u}{u}{r}{r} available.