Skirmish efficiency and teamfight utility.
Durability and crowd control
After immobilizing an enemy champion gain defenses and later deal a burst of adaptive damage around you.
Whenever you gain a shield, your next basic attack against a champion deals bonus adaptive damage.
Restore health over time based on your missing health.
Increase your Tenacity and Slow Resistance for each summoner spell on cooldown. Immediately after casting a Summoner Spell, gain a larger burst of Tenacity and Slow Resistance for a moderate duration.
Creative tools and rule bending
+5% Max CDR
+5% Summoner Spell CDR
+5% Item CDR
Get a free biscuit every 3 minutes, until 12 minutes. Biscuits heal and permanently increase your max mana.
Like Courage but with damage, Thresh can easily proc Aftershock and it adds to his kill potential if you can land the explosion.
Shield Bash on Thresh allows you to output a massive amount of all-in damage after landing a [Q] and shielding yourself with [W].
Second Wind allows you to trade aggressively in lane while still shrugging off incoming damage.
Unflinching allows you to stick to your target after [E]ing them for repeated autos and the damage needed for the kill.
Cosmic Insight is an all-around great rune choice as the CDR empowers your strong utility and the Summoner CDR grants you more safety an opportunity for Flash engages.
Biscuit Delivery's sustained mid-fight healing is great for early all-ins when you land a hook and are absorbing a lot of front-line damage.