Sygg's Command

Three of the four modes are pure Merfolk-deck currency: copy a Merfolk you control to double a scaled body or an enters-trigger, tap and stun a blocker to push an alpha strike through, and cantrip to refuel a curve that empties fast. The lifelink line is the outlier, a team-wide swing that resets a life total in the middle of a race. What sharpens the modality is that the two most aggressive picks (the token copy and the stun-counter tap) are both proactive, so you rarely pay the choose-two cost on a purely reactive turn: you develop the board and disrupt a blocker in a single cast. The stun counter is the cleverer piece of the design, because tapping the creature is only half of it; the counter also eats the target's next untap, holding a key defender off the field through the opponent's next turn for one mode. Bundling a copy effect, a combat-clearing tap, and a card draw onto one three-mana sorcery is a lot of tribal glue in a small package, and capping it at two modes is what stops it from being all of those things on the same turn. The lifelink and draw modes give white-blue a race-flipping wide-board finisher that this color pair rarely gets stapled to the same sorcery it uses to develop the board.