Accorder Paladin

The 3/1 body is the giveaway: this is a creature priced to swing once, not to trade or block, and battle cry is the keyword that makes that math pay. The mechanic only ever points forward, pumping each other attacker the moment this one declares, which means the Paladin wants a board already wide before it arrives. As the lead-in to a token swarm, it turns a row of 1/1s into a row of 2/1s and converts a stalled aggro hand into reach. The trade-off is honest: one toughness means it dies to almost everything and contributes nothing on defense, so the card is built to be spent. That is the discipline behind the rate. Two mana for a 3/1 that anthems the rest of the team is generous precisely because the Paladin asks you to be the aggressor, to commit creatures to combat, and to accept that it will not be there next turn if the swing goes badly. Battle cry rewards going wide and punishes nothing else, which makes this a clean signpost for what a one-drop-heavy white aggro deck is trying to do: flood the board, then add a turn's worth of damage on top by attacking with a creature whose only real plan is to attack.