There are eight base items in Teamfight Tactics, each of which can be combined with another base item to create something new. They can even connect with each other. So I made up a useful list of all items in the game and combo recipes to create them.
Main subjects
Best Sword - 20 damage
Recurve Bow - 20% Attack Speed
Chainmail - 20 Armor
Negatron's Cloak - 20 Magic Resist
Tear of the Goddess - 20 Mana
Biggest Wand 20% Spell Damage
Giant's Belt - 200 Health
Shovel
Best Sword
+ Best Sword = Infinity Edge - Critical hit damage is increased by 100%.
+ Recurve Bow = Sword of God - every second there is a 5% chance for a 100% critical hit.
+ Too Large Rod = Hextech Revolver - heals 25% of the damage done.
+ Tear of the Goddess = Shojin Spear - after use, restores 20% of the remaining maximum mana in one attack.
+ Negatron Cloak = Bloodthirst - restores 35% health
+ Giant's Belt = Herald of Zeke - after the start of the battle, the attack speed of your allies will increase by 12,5%.
+ Chainmail = Guardian Angel - revival from 300 health.
+ Shovel = Youmuu Ghost Blade - the owner will become an Assassin.
Recurve bow
+ Best Sword = Sword of God - every second there is a 5% chance for a 100% critical hit.
+ Recurve Bow = Rapid Fire Cannon - doubles the attack range. Such attacks cannot be dodged.
+ Rabadon's Death Hat = Ginsu's Blade of Fury - 5% to attack speed on the stack on hit.
+ Tear of the Goddess = Shanker Static - every third attack deals 100 magic damage.
+ Negatron's Cloak = Cursed Blade - gives a chance to retreat when hit; removes 1 star.
+ Giant's Belt = Titanic Hydra - Attacks deal 10% of the wearer's maximum health as additional damage.
+ Mail = Phantom Dancer - evading all critical hits.
+ Shovel = Blade of the Broken King - the owner becomes a Blade Master.
Chain mail
+ Best Sword = Guardian Angel - revival from 300 health.
+ Recurve Bow = Phantom Dancer - evading all critical hits.
+ Too Large Rod = Medallion of the Iron Solari - protects units around you for 200 health at the beginning of the battle.
+ Tear of the Goddess = Frozen Heart - neighboring enemies attack 20% slower.
+ Cloak of Negatron = Sword Destroyer - attacks have a chance to disarm the enemy.
+ Giant's Belt = Red Buff - Attacks burn for 2,5% of maximum health. Burned units cannot heal.
+ Chain Vest = Spiked Armor - Reflects 25% of received damage.
+ Shovel = Oath of the Knight - the owner becomes a Knight.
Negatron's Cloak
+ Best Sword = Bloodthirst - restores 35% health
+ Recurve Bow = Cursed Blade - gives a chance to retreat when hit; removes 1 star.
+ Biggest Rod = Ionic Spark - whenever the enemy casts a spell, he takes 100 damage.
+ Tear of the Goddess = Silence - gives a great chance to silence the attack.
+ Negatron's Cloak = Dragon's Claw - 83% to resistance to magic damage.
+ Vlican's Belt = Marshmallow - at the beginning of the battle, drives the enemy away for 5 seconds.
+ Chainmail = Sword Destroyer - attacks have a chance to disarm the enemy.
+ Shovel = Hurricane Runaan - attacks 2 additional targets when attacking. Additional attacks deal 50% damage.
Tear of the Goddess
+ Biggest Sword = Shojin's Spear - after applying the ability, restores 20% of the remaining maximum mana per attack.
+ Recurve Bow = Sharpen Static - every third attack deals 100 magic damage.
+ Too Large Rod = Echo of Luden - on hit, spells do 100 damage from fragments.
+ Tear of the Goddess = Embrace of the Seraphim - after each spell restores 20 mana.
+ Cloak of Negatron = Silence - gives a great chance to silence the attack.
+ Giant's Belt = Atonement - after death, heal nearby allies for 1000 health.
+ Mail = Frozen Heart - neighboring enemies attack 20% slower.
+ Shovel = Darkin - the owner becomes Darkin.
Too Big Rod
+ Biggest Sword = Hextech Revolver - heals 25% of the damage dealt.
+ Recurve Bow = Ginsu's Blade of Fury - on hit increases attack speed by 5%.
+ Too Large Rod = Rabadon's Death Hat - 50% to the power of abilities.
+ Tear of the Goddess = Echo of Luden - on hit, spells do 100 damage from fragments.
+ Cloak of Negatron = Ionic Spark - whenever the enemy casts a spell, he takes 100 damage.
+ Giant's Belt = Morellonomicon - spells deal burn damage and prevent any healing.
+ Mail = Locket of the Iron Solari - protects units around you for 200 health at the beginning of the battle.
+ Shovel = Yumi - the owner becomes a Wizard.
Giant's Belt
+ Best Sword = Herald of Zeke - after the start of the battle, the attack speed of your allies will increase by 12,5%.
+ Recurve Bow = Titanic Hydra - Attacks deal 10% of the wearer's maximum health as additional damage.
+ Too Large Rod = Morellonomicon - spells deal burn damage and prevent any healing.
+ Tear of the Goddess = Atonement - after death, heal nearby allies for 1000 health.
+ Cloak of Negatron = Marshmallow - at the beginning of the battle, drive the enemy away for 5 seconds.
+ Giant's Belt = Warmog's Armor - restore 5% health per second.
+ Chainmail = Red Buff - Attacks burn for 2,5% of maximum health. Burned units cannot heal.
