Rework one ability in the game (champion or item) - what would you do?
Personally I would change Tryndamere's ultimate:
PASSIVE: Tryndamere gains +10/15/20% lifesteal and immunity to Grievous Wounds when under 30% health. ACTIVE: For the next 6 seconds, Tryndamere gains 10/25/40% movement speed, +50% tenacity, and his passive health cap is raised to 50%. When Tryndamere has less than (10% of his maximum health) he gains a shield for 100/300/500 [+10 (+4 per 100 bonus AD)% of his maximum health], which will decay over 3 seconds once the effect ends.
Cooldown: 120/100/90 seconds
Q changes. Remove some of its power budget, enable the rest of his kit to grow down the road.

+
item which adc's like
or aa's like
can use effectively.
For
updatenthe splash art so it has 2 blue swords and a green hammer where sheen is, stil habe the yellow triangle ajd a red orb connecting the 3 weapons.