What do you think is the most underrated ability on your favorite champions' kits?

so, i've been an main for a while now. I always hear people raving about her ultimate, but if you ask me, the strongest ability on her kit is actually her Command: Dissonance (her W)

this ability gives Orianna SO much power. Since it's instant, it turns her Q poke in to a 1.2 ratio nuke without fail every time it's off cooldown. Since it's a zone slow, it can't be cleansed by things like garen's Q, and because the zone sticks around for quite a while afterwards, orianna can use the zone to kite around her opponents. The slow and speed boost are both powerful on their own (useful for following up your spells with auto attacks, juking, or backing off after a combo), but combined, they make orianna incredibly difficult to chase, run from, or trade back against. Overall, i think this spell is massively under-rated for the amount of power and tactical depth it provides orianna's kit.

also has a very strong ability - his W, Terror Capacitator. Partly because people underestimate Urgot or do not know what he does, it is remarkably easy to take urgot's W at level one, walk up and auto attack the lane opponent when they play forward to CS, and turn on his W just as the auto attack hits. if the opponent tries to walk up to trade back, he can kite with the slow. If they try to walk back, they are slowed, and urgot can cheese them very hard. if they trade back with abilities, the worst urgot can get out of it is an even trade - thanks to his shield, his decent base AD, and the debuff from his passive. Without fail, i've been able to turn early game laning in my favor with this strategy on urgot, and i think it's one of the strongest things about his kit and his power curve.