Twinflame Tyrant

Damage doublers usually attach the effect to burn (Fiery Emancipation) or to combat (Gratuitous Violence), but this one bolts the multiplier onto a Dragon and points it in exactly one direction: outward. The clause is deliberately asymmetric. It doubles anything a source you control deals to an opponent or an opponent's permanent, so combat, burn, ping abilities, and everything in between all suddenly hit twice as hard, while your own life total and board stay untouched by the arithmetic. That one-way valve is the design tension worth noticing: a symmetric doubler like Furnace of Rath would happily magnify the damage coming back at you, so it lives on a knife's edge; this card removes the downside entirely and pays for it with a body that is honest rather than dominant. A 3/5 flier is a real clock and a real blocker, but not a stat line that ends games on its own, so the multiplier wants damage sources already worth doubling rather than promising to be the whole plan. The window it cares about is any point a source you control connects, and because doubling scales linearly, the total gain is the same whether you are magnifying one big swing or a spread of small ones. Concentration is not the reward; volume is. The multiplier is a percentage bonus on a total you were going to inflict anyway, and it only earns its five mana in a shell built to inflict a lot.