Fearless Liberator

Boast keys off the attack step, and this is the mechanic reduced to its plainest expression: you must commit the body to combat before the payoff unlocks, so the value is never free. Swing, then spend three mana to make a 2/1 Dwarf Berserker token, and you have widened the board by pressing the assault rather than by holding back. The tokens are vanilla, not copies, so there is no runaway self-cloning engine here; what compounds instead is pressure. Every attacker you add is another body that can go to combat next turn, and the source itself keeps boasting each time it swings, converting late-game mana into fresh threats. That is the quieter design job this fills: red has historically flooded out once it emptied its hand, and a repeatable mana sink attached to an attacking creature gives the color a way to turn excess lands into board presence without needing more cards. The tension is deliberate. Boast asks you to expose creatures to blockers and removal to earn the reward, punishing the passive and paying out the aggressor. The interest is not in the two-drop body but in the loop between the attack requirement and the token it earns, each swing buying the next one.