Muriel Support Build (v0.18.3)

Early Game

So we start with Codex to give us more magical power to be able to help our carry to get more poke out of the enemy team.

Then we start finishing to build the tier 2 item Mystic Cane which will help us with the mana regen.

Core Items

We always want Time Warp and Lunaria in our build as the first 2 core items.
Time Warp will help us a lot with ability haste and some decent magical power, as well as mana regen
and Lunaria just gives as the healing for our teammates. And because you can do decent damage as Muriel, you will get decent stacks with Lunaria

• Time Warp
• Lunaria

Mid/Late Game

From now on we can be a bit more flexible, either building Crescelia if we are more focused on helping our team with more damage output or if we go anti-heal with Tainted Totem

Then we can either build Marshal for more attack speed for our team and ourselves or if we build Everbloom if the enemy team has decent damage we need to mitgate.

• Crescelia
• Tainted Totem
• Everbloom
• Marshal

Late Game

The last two items are kind of whatever. But I recommend building Windcaller cause it gives you and your team always a nice speed boost. Especially combined with the movement speed boost from your ability "Alacrity" (RMB). You can also build Astral Catalyst if you feel like you need your ultimate ability more often.

And the 6th item, you can either build a spellshield like Spellbreaker or you go more damage with Oathkeeper

• Windcaller
• Astral Catalyst
• Spellbreaker
• Oathkeeper

Alternative/Situational Crest

This depends on your enemy team. If they have a gideon I would always go Silentium instead, because you can easily interrupt his ultimate and potentially save your team. But if your facing a lot of stun character in your team, I would prefer Reclamation instead.

Pro Tip: If Aurora uses her ultimate, you can use Reclamation before you freeze to completely negate the freezing effect.

• Silentium
• Reclamation