Not only is Glorybringer a perfect target for Saheeli Rais -2 ability, as the token can be exerted without concern, but even Felidar Guardian can reset an Exerted Glorybringer to allow it to keep attacking and breathing fire all over your opponents battlefield
Slow everyone down, counter any spell that threatens your lock, and eventually win with an inevitable, hard-to-interact-with card like Approach of the Second Sun
I wanted the Mother of Runes type cards so that I could protect Dancer, while going to town adorning her with auras
Relying on what others may have is always risky and should rarely be your main strategy
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Still, that build, which looks to grab Ad Nauseam, haunts the imaginings of Commander players whove been around a while, so if you play a more casual Voltron-style Zur the Enchanter deck, you might need to do some table persuasion to convince them to let you live