Pantheon

Their Fate is Sealed

Lane harassment and consistent damage output.

Durability and crowd control

Aftershock

After immobilizing an enemy champion gain defenses and later deal a burst of magic damage around you.
Demolish

Charge up a powerful attack against a tower while near it.
Second Wind

After taking damage from an enemy champion heal back some missing health over time.
Overgrowth

Gain permanent max health when minions or monsters die near you.

Empowered abilities and resource manipulation

Absolute Focus

While above 70% health, gain extra adaptive damage.
Gathering Storm

Gain increasing amounts of AD or AP, adaptive over the course of the game.

Aftershock is massive for empowering your ability to all-in and assassinate your target without also giving up your life.

Demolish on Pantheon allows you to turn early lane kills into meaningful tower damage and early gold advantage,

Second Wind further empowers your ability to trade efficiently in lane so that you're able to all-in when you find the opening.

Overgrowth's health scaling helps to patch up one of Panth's weakest areas, his late game.

Absolute Focus' extra AD is huge for empowering your early game [Q] poke so that you're able to get first blood.

Gathering Storm further looks to patch up Pantheon's weakest aspect, late game scaling.