Dies to Removal

Against tokens (specifically Xenagos) or small creatures, sometimes Desecration Demon never got to untap, and opponents went straight around it. Giving your opponents a choice whether your creature can do creature things is not upside.

Master attacks for 5 each turn, it's as simple as that. I'm not saying Master is the best creature ever, but against some decks it's an unblockable, fast clock. You can't exactly ignore it forever.

No downside, except your 3 drop hitting for 5 in the air each turn.

What was the upside of Desecration Demon exactly?

That's interesting. I agree on the double red, Rabblemaster seems like an unreliable red source. Herald bestowing Rabblemaster seems like the dream though! Where does Hoogland post his brews, tappedout?

Exactly, and Master of the Feast is a similarly large undercosted creature.

My post is ambigous, I was talking about Master in the second sentence.

I had Desecration Demon in the sideboard for Monster decks earlier this year, and it was the blade. Definitely to be considered, it's the biggest flier in the format?