The Mark XVIII Armor (codenamed Cassanova) was Tony Stark's eighteenth Iron Man suit and was specialized in both artillery level repulsor technology as well as stealth technology. It was a part of the Iron Legion and was destroyed during the Battle on the Norco.
The Cassanova Armor was called, along with the rest of the Iron Legion to help Tony Stark and James Rhodes during their fight against Aldrich Killian and his Extremis Soldiers. During the course of the fight, a number of armors were destroyed, though they eventually managed to eliminate all of the Extremis Soldiers. At the end of the battle, the remaining suits that were not destroyed by Extremis Soldiers were destroyed when Stark activated the Clean Slate Protocol, including the Mark XVIII. 
After making the Mark XVI nearly undetectable, Tony Stark took it to the next level by improving the armor's cloaking system. Stark also gave this armor a reactor that can emit blasts almost as powerful as the Mark XVII.
| Mark I • Mark II • Mark III • Mark IV • Mark V • Mark VI • Mark VII|
Mark VIII • Mark IX • Mark X • Mark XI • Mark XII • Mark XIII • Mark XIV • Mark XV • Mark XVI • Mark XVII •
Mark XVIII • Mark XIX • Mark XX • Mark XXI • Mark XXII • Mark XXIII • Mark XXIV • Mark XXV • Mark XXVI •
Mark XXVII • Mark XXVIII • Mark XXIX • Mark XXX • Mark XXXI • Mark XXXII • Mark XXXIII • Mark XXXIV •
Mark XXXV • Mark XXXVI • Mark XXXVII • Mark XXXVIII • Mark XXXIX • Mark XL • Mark XLI
Mark XLII • Mark XLIII • Mark XLIV/Veronica • Mark XLV • Mark XLVI • Mark XLVII • Mark XLVIII
|Mark I • Mark II/Iron Patriot • Mark III|
|Mark I • Mark II|