Resolute Blademaster

Double strike is the keyword that punishes you twice for ignoring a board, and handing it out across an entire team is a payoff that lives or dies by what has already assembled. That is the bargain here: a modest body whose Rally trigger fires on its own arrival, immediately granting every creature you already control double strike for the turn, then fires again for each subsequent Ally you land. The Rally tribe was built on exactly this loop, a cascade of cheap creatures each squeezing one more trigger out of the others, but most Allies dealt in incremental rewards: a +1/+1 counter here, a point of life there, scry on entry. Double strike is the version that ends games. The structural catch is when the trigger resolves. Rally cares about entry, not attack, and the buff lasts only until the turn ends, so the payoff wants bodies hitting the battlefield during a turn you can also profitably alpha-strike with. That timing is what makes it a build-around in the strict sense: it rewards a wide, recurring stream of cheap Allies and an existing board worth doubling, not a single splashy follow-up. Where the lower-impact Rally creatures rewarded patience, this one rewards committed go-wide assembly, and the difficulty of engineering that swing turn is precisely why the effect is allowed to be this lopsided when it connects.