Not here to complain about the rune: we'll either all stay or all leave after Season 8 pre-season, BUT who do you think (KNOW) is gonna wreck your games with it in Season 8.
Since I've never played Ranked and I know the people I play with and against I'm sure Veigar and Tryndamere are gonna get real scary real soon and I'm loving every second thinking about it.
Im taking this on 
.
But I really dont want to face 
with this
Ultimore does look amazingly strong. I keep thinking that it's still a tradeoff for other options.
That being said, I think will be strong with it.
How can you not mention Cho with as much as his ult is complained about.
Honestly it sounds annoying on all kinds of champs.
The epitome of an Ultbot
Not really scared, I'm just trying to theory craft the best champs to use it.
The best ultimate for this abilities probably have a low to mid range CDR. (Too low, at it could be trivial. Too high, and you won't be able to stack it.) I would also assume that the opportunity cost of this rune, would be higher scaling on said ults. So the best ults for this particular rune would likely have a strong mobility, CC, or utility component. And because you want to cast the ult multiple times, I would assume the ult would be best if used proactively, rather than reactively.
This in mind, Which champs or class of champs would fit this bill?
I would probably include many Vanguards and Divers who are pretty ult reliant for starting engages. (Older tanks like Malphite for example, Vi also comes to mind.) Particularly when Jungling, as it will allow for more powerful ganks more frequently.
I would also think that Assassins who have strong damage or damage amp ults, or ults that include invisibility or untargetability, would allow them to pull of their big burst combos more frequently. (Thinking along the lines of Talon, Zed, and Kayn (SA form)) I'm not so worried about Ekko, because his ult is often more reactive, and could be a little more difficult to stack.
I might also include a certain class of what I call "Engage mage," who are reliant on their ults for teamfights, causing lots of damage, and possibly disruption. (Annie, Fiddlesticks, Lissandra, Kennen)
Lastly, Most supports, who rely more on their ult's utility than its damage.
pretty sure there are plenty more
I'm thinking guys like vi, rengar, gragas, Lee sin, junglers who can go into the sorcery tree and their ultimates give them tremendous kill pressure
