A board wipe which can spare your board is awesome, and both have scenarios where they do that
Arthur attacks, and you happen to put Bloodthirster in play
And once you have them you can use this X-spell to cheat essentially anything you want onto the field
What If I Lose My Files
Roalesk, Apex Hybrid In some circumstances you're hoping not to get the death trigger on Roalesk, Apex Hybrid, since it's kind of a massive threat in play
Finally, Red + Green Burn tends to punish what Green hates, namely all-things winged or artificial (Clan Defiance, Cindervines, Ruric Thar, the Unbowed, etc.), or staples Burn onto already-useful effects (Vengeful Rebirth, Exploding Borders, etc.)