Militia Rallier

The "can't attack alone" clause is the price tag, and it points the card squarely at go-wide decks: this is a creature built to be the second, third, or fifth attacker in a swarm rather than a lone beater. The untap trigger is where the interest lives. Because it fires on attack and untaps a target creature, it hands you a combat step's worth of flexibility that the body itself never suggests: leave a blocker back after committing an attacker, reset a creature with a costly tap ability, or ready something for a second use the same turn. In a tokens or convoke shell it quietly refuels a mana producer or a tapper mid-combat; in an aggressive white board it lets you swing all-in without surrendering defense, since one attacker gets to guard the fort on the way back. The design is disciplined about not overreaching. The attack restriction guarantees the trigger only matters when a real board already exists, so the untap can never become a solo value engine; it is glue for a wide position rather than an enabler in a vacuum. A 3/3 for is a fair floor for a card whose ceiling depends entirely on the creatures standing next to it, which is exactly the point: this rewards the board you have built, and does almost nothing without one.