Zeke's Harbinger
So you guys are updating Zeke's Harbinger, and while the whole frost storm thing looks cool, gating it by the ultimate is not so much. This trigger is really only effective if you use your ultimate offensively, and there a too many moments where supports need to use their ultimates defensively, where this storm effect would go completely to waste.
I'm not sure what direction to take with the trigger, but I feel like this is not it. I would almost say to drop the bind mechanic entirely from the item (as it always seems like the barrier holding it back), and have the active be the storm that operates on a charge system, similar to Ashe's Q. Just make it anything else, because casting your ultimate to trigger an item just has too many random factors for the item to actually be reliable.
/
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will dip into both resistance types.