Alistar

Support

Can’t Milk Those

Teamfight frontline and creative ganks/roams with Hexflash.

Resolve

Durability and crowd control

Aftershock

After immobilizing an enemy champion gain defenses and later deal a burst of adaptive damage around you.
Bone Plating

After taking damage from an enemy champion, the next 3 spells or attacks you receive deal less damage.
Conditioning

After 10 minutes gain 8 Armor and 8 Magic Resist and increase your total Armor and Magic Resist by 5%.
Unflinching

Increase your Tenacity and Slow Resistance for each summoner spell on cooldown. Immediately after casting a Summoner Spell, gain a larger burst of Tenacity and Slow Resistance for a moderate duration.

Inspiration

30-270 health (at levels 1-18)

Hextech Flashtraption

While Flash is on cooldown it is replaced by Hexflash.

Hexflash: Channel, then blink to a new location.
Future’s Market

You can enter debt to buy items.

WhyAftershock

Aftershock, like Courage of the Colossus, is a great keystone choice for Alister as it gives you defenses upon engaging and a bit of extra damage thanks to the explosion.

WhyBone Plating

Bone Plating allows you to negate a lot of initial incoming burst damage when diving into the enemy team for an engage combo with [W]->[Q]

WhyConditioning

Conditioning allows you to scale into the mid game as an incredibly resilient front line tank with just a few items and your [R], so that you can get multiple [Q]s off in a teamfight.

WhyUnflinching

Unflinching allows you to stick to a target while your [E] charges after Flashing onto them, helping you proc the extra stun for the kill and follow up with additional CC.

WhyHextech Flashtraption

Hexflash in an incredibly threatening ability on Alistar if you learn how and when to use it effectively. If you're able to control a lane brush with a Control Ward you present a ton of lane pressure being able to Flash out at any moment.

Hexflash is also great for roams to the mid lane where you're able to flash in the lane from either the Raptors or behind the mid walls.

WhyFuture’s Market

Future's Market doubles down on Alistar's engage-heavy playstyle that can often lead to big snowballs, stretching out your gold lead for even more early power-spikes.