True Ice Gunblade
There should totally be an item that combines the Hextech Revolver and Sheen, so here's my idea for one:
Recipe: Sheen+Hextech Revolver+900 gold Stats: 60 AP, 10% C.D.R., 400 Mana Unique Passive: Spellblade. After using an ability the user's next basic attack does 100% base AD+50-125 true damage(40 second cooldown, shared with other hextech items)
Here are some other random ideas.
Killifier Recipe: Last Whisper+Serrated Dirk+650 gold Stats: 45 AD Unique Passives: +18 Lethality, Last Whisper: 30% Armor Penetration
Deadifier Recipe: Cloak of Agility+Executioner's Calling+B.F. Sword+500 gold Stats: +25% critical strike chance, 60 AD Unique Passives: Physical damage inflicts Grievous Wounds on enemy champs for 3 seconds.
Assassin's Law Recipe: Oblivion Orb+Serrated Dirk+500 gold Stats: 35 AD, 35 AP, 300 HP Unique Passives: Touch of Death: 15 Magic Penetration, 18 Lethality
Healthinator Recipe: Chainmail Vest+Negatron Cloak+Rejuvenation Bead+Kindlegem+430 gold Stats: 45 Armor, 45 MR, +100% Base Health Regen, 250 HP
Juggernaut's Sabaton Recipe: Boots of Speed+Ruby Crystal+400 gold Unique Passives: Enhanced movement: +45 MS, Juggernaut: Base HP from level ups is increased 50%.
Sneakers Recipe: Boots of Speed+800 gold Unique Passive: Enhanced Movement: +45 MS, Cat-like Tread: Gain +5% MS while unseen by enemy champions and turrets.
Phantom's Mantle Recipe: Spectre's Cowl+Crystalline Bracer+950 gold Stats: 450 HP, +100% base health regen, 55 MR Unique Passive: After taking damage from an enemy champion, gain +200% base health regen for 10 seconds, increased by 1% for every 2% max HP the user is missing.
Jaurim's Gauntlet Recipe: Jaurim's Fist+Pickaxe+Crystalline Bracer+575 gold Stats: 400 HP, 40 AD, +100% base health regen Unique Passive: Champion takedowns grant +0.5% max HP.
Siege Bastion Recipe: Raptor Cloak+Kindlegem+900 gold Stats: 40 Armor, +150% base health regen Unique Passives: +10% C.D.R., Point Runner: build up to 20% MS over 2 seconds while near turrets, fallen turrets, and Void Gates. Unique Active: Grant allied champions near turrets/fallen turrets/Void Gates your base health regen for 10 seconds(120 second cooldown).