Abilities of Trundle
Spell skill priority is an important winning factor for Trundle. Understanding the abilities of Trundle in League of Legends is another. Below you can find all the relevant information on Trundle abilities. In order for item builds you should check the build for Trundle.
Passive: King's Tribute
When an enemy unit dies near Trundle, he heals for a percent of its maximum Health.
Chomp
Trundle bites his opponent, dealing damage, briefly slowing and sapping some of their Attack Damage.
Trundle's next Attack deals totaldamage physical damage and briefly Slows by slowamount*100%, then Trundle gains bonusad Attack Damage for sapdebuffduration seconds and the enemy loses sappedad*-1 Attack Damage for the same duration.
Frozen Domain
Trundle turns target location into his domain, gaining Attack Speed, Move Speed, and increased healing from all sources while on it.
Trundle freezes an area for e4 seconds. While inside he gains e1% Move Speed, e2% Attack Speed, and e3% increased healing.
Pillar of Ice
Trundle creates an ice pillar at target location, becoming impassable terrain and slowing all nearby enemy units.
Trundle creates an icy pillar for e1 seconds, briefly Knocking Back enemies directly over it and Slowing nearby enemies by e2%.
Subjugate
Trundle immediately steals a percent of his target's Health, Armor and Magic Resistance. Over the next 4 seconds the amount of Health, Armor, and Magic Resistance stolen is doubled.
Trundle drains the lifeforce of an enemy champion, dealing totalpercenthpdamage max Health magic damage and stealing armormrshred*100% Armor and Magic Resist over actualdurationofdrainbuff seconds.
FAQ on Trundle
What do you max first on Trundle?
Most Trundle pros max out 
Frozen Domain first.