Massive all-in 1v1 threat and split-pushing.
Improved attacks and sustained damage
After a few seconds in combat, your first attack against a champion grants bonus AD and convert some of your damage to True Damage.
Excess healing on you becomes a shield.
Takedowns on enemies grant permanent Attack Speed.
Deal more damage to champions while you are low on health.
Burst damage and target access
Gain a burst of Lethality and Magic Penetration after using a dash, leap, blink, teleport, or on leaving stealth.
Entering brush temporarily swaps your trinket for a Ghost Poro, which grants vision until discovered.
While either you or your poro is in enemy territory, gain adaptive stats.
+9% Attack Speed
+6 AD or 10 AP
+5 Armor or 6 MR (match-up)
Conqueror on Tryndamere makes you an unstoppable late game 1v1 duelist able to split push and take on anyone who comes in your way.
Overheal synergizes well with Tryndamere's constant self healing from [Q] and BotRK allowing you to enter trades/fights with the early health advantage.
More Attack Speed means more raw damage, kill threat, and split-pushing tower potential.
Last Stand is the perfect damage rune for Tryndamere synergizes insanely well with your[R]. As you pop [R] at low health you'll have a few seconds of being able to deal massive amounts of damage.
Sudden Impact synergizes well with Tryndamere's [Q] when looking to spin in for the all-in kill.
Ghost Poro provides fantastic on-demand lane safety when you're able to keep the enemy shoved in and keep the poro in the river brush uncontested.