Scourge of the Throne's ability has an intervening "if" clause
Big flying dragons are usually great in Limited, but the only thing Twinflame Tyrant asks of players is sufficient investment into red and maybe another creature or two to be a slam-dunk pick
The only other options are Aquitect's Will, which just puts a flood counter on a land (and draws you a card if you control a Merfolk), and The Flood of Mars, which can transform creatures into copies of itself if you opt to put a flood counter on a creature
You've also got a few sources of life gain (see Mask of Griselbrand, Basilisk Collar, and Blood Artist), and a few ways to wipe the board if things get out of hand (see Decree of Pain and Blasphemous Act)
They stay locked and unreadable all the way through the competition - so not even we know which numbers hold an instant win
(A useful heuristic is that if you have Raichu on your Bench, Pickup Devolution Spray