Katara, the Fearless

Ally decks lived and died on their enters-the-battlefield triggers: each new Ally pumped the team, drained a life, or scried, and the whole tribe scaled by counting bodies as they arrived. This doubles that math outright. Every Ally trigger you control fires twice, so a single new recruit becomes two rally triggers stacked, and the incremental engine that Allies were built around suddenly compounds instead of just adding. The design is a rare doubler that keys off a creature type rather than a keyword or a card type, which is why it reads narrow but plays as an accelerant: it turns the tribe's characteristic slow snowball into a genuine per-drop payoff. Note the wording is deliberately broad. It hits any triggered ability of an Ally, not only the rally-style enter triggers, so attack triggers and death triggers all fold in too. The 3/3 body across three colors is almost incidental; the value is the phrase "an additional time," and the tension in the card is that it only rewards a board already committed to the type. Drop it into a deck with no other Allies and it is a vanilla creature with a dead line of text. Assemble the tribe first and it becomes the multiplier the archetype never quite had at its center.