Bayle the Dread

When Bayle the Dread enters the battlefield, destroy all other dragons in play

{t},{r}{b}{x} - Bayle the Dread deals X damage to target creature, planeswalker, or player.

{t},{b/r}{x} - Add X red mana to your mana pool next turn. Mana added in this way can only be spent on activate abilities.

As long as Bayle the Dread's toughness six or less, it gets +3/+0 and has flying, menace, and first strike.