You can discard 1 "Blue-Eyes White Dragon", or 1 card that mentions it, then target 1 "Blue-Eyes" monster in your GY
Admittedly, I have not played with the Natures Vengeance deck yet, though I have played against it on multiple occasions, seeing Avenger of Zendikar make twelve 7/8s in one turn
[68] Invitation to a Pro Tour, Pro Points, and prize money could also be earned in lesser tournaments called Grand Prix that were open to the general public and held more frequently throughout the year
Maybe if this only needed to Tribute one of those Fusions, and if Azbardion wasn't such a flashy end-of-the-game monster, both Revival of Doom and Azbardion would be playable enough to be worth using
Virtually none of the planeswalkers included have devastating ultimates, so the effects that let you cheat extra loyalty onto your walkers arent as tilting or game-breaking as they otherwise might seem