Keldon Strike Team

Nobody spends three mana on a 3/1 to keep it around; the creature exists to hand out a single hasty turn. When it enters, everything you already control sheds its summoning sickness for one attack step, which turns a stalled hand of dumped-out creatures into an alpha strike that connects before the defender can reassemble blockers. The white kicker forks the spell into two plans from one cast: leave it unkicked and it is mono-red tempo, a mobile haste-granter in the lineage of Fervor effects compressed onto a body; pay the surcharge and it becomes a Boros go-wide swing that supplies its own attackers, two Soldiers arriving alongside it and joining the charge on the spot. The pivotal restriction is that the haste only covers the turn of entry: it is a burst, not a standing anthem, so it favors boards you intend to convert now rather than a slow accumulation you plan to hold. Read the timing carefully and the design snaps into focus. Nothing in your hand gets better until this resolves, at which point a frozen position empties itself into damage across one combat. Hold your creatures back, commit them together, and let the summoning-sick tax lift for the single turn that decides the game.