Zhonya's Hourglass

2600
Activate to become invincible but unable to take actions

65 Ability Power
45 Armor
10 Ability Haste

Active - Stasis: You become Invulnerable and Untargetable for 2.5 seconds, but are prevented from taking any other actions during this time (120s cooldown).
Builds From

Seeker's Armguard Increases Armor and Ability Power 265 Stopwatch Activate to become invincible but unable to take actions 650 Fiendish Codex Increases Ability Power and Cooldown Reduction 465