Threaten Combos
Alena, Kessig Trapper + Threaten + Reiterate
Combo result
Infinite red mana. Infinite storm count. Infinite untaps of your creatures. Infinite threatens of your opponents creatures. Infinite casts of any other instant or sorcery in your hand.
Prerequisites
Alena on the battlefield. Alena cannot have summoning sickness. All other cards in hand. 6 mana available, 1 of which must be red