I'm not convinced that it would blow up multiple things in a turn that often. Hand should be pretty low by then.I think having these cards right next to each other explains it quite well.
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while the idea of Ugin into Titan woul make sense, the reality is "ugin, 0, rock, rock, rock. Oh look their board is wiped"
(But Karn Liberated is a solid walker and usually scales well with power level, that would be my vote if you're looking for a colorless "Titan planeswalker" as a control win-con.)