I have not as yet seen this used for cheating in big (artifact) dorks
High Troller generates ludicrously swingy board states, which is exactly what some Commander players love to do (and I had a blast losing to it in a protracted board game where it survived by ludicrous variance and eventually killed me)
Legendary Swords - Anduril, Flame of the West, Glamdring, and Sting, the Glinting Dagger are all great, and all going to see play in various strategies
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That gives you some room away from big scary creatures for at least a turn, letting you push back any devastating attacks and/or clearing some runway to get damage through
You can cloak anything with Vannifar, from spells to lands, effectively preventing you from ever having a dead draw