I've gone a little more in depth on changing his kit up to a more adaptive rework. With the Fiddlesticks and Volibear reworks making their way to the rift, it got me excited for the next pole to be taken. I'm offering my early input for Trundle to be Reworked. I've always loved playing him from years ago but with how the meta has changed, tweaks made to his kit, I don't enjoy playing at all where I've stopped playing him. To relate, Volibear was a champion considered so simple and one dimensional. He had a lack luster kit, tried to run at you and hopes he catches you and tried to kill you if you're foolish to stay in his domain. You can take those same characteristics and put Trundle in front of them and it's the same. Looking into Trundle's lore, it describes him as a hulking, regen monster, with devious and mischievous skills. He either tried to outsmart you or beat you. But he also wields a magical weapon that never melts and gives off an "aura" of cold. How he got such a weapon though was from stealing it. Trundle also has this characteristic to challenge those around him 1 on 1.
An interesting mechanic I would love to see is his 'w' be replaced with a point click challenge feature, where target allows trundle to gain movement speed and attack speed while within certain range of and moving towards target. While the target is challenged, you need to get 3 auto attacks off where True Ice is then applied to the targets body and a chunk of damage is applied. With this proc, the attack speed persists for a few more seconds. The chuck the target lost is then regen to trundle over time.
To make this work, his passive will have to be changed to something that reacts to True Ice applying or proc.
Just like in the lore when Trundle returned with the magical weapon, he caved in the chieftain’s face. His q ability could resemble that where he slams down his club, the area left behind slows enemies.
His e would change to him hurting himself but gaining bonus armor, magic resist, and movement to regen health lost over 10 seconds.
Ultimate would apply an area of affect slow around the target, it wouldn't slow the target. If the target gets a certain distance away, or 10 seconds go by, the ring implodes dealing damage and creates a terrain of ice slowing all enemies. Trundle would steal the targets HP only.