Effect
Whenever a 
Mage casts, they inflict Frost on their target equal to 66% of the Mana spent.
Why Mage's Frostbite Banner is S tier
S
Every Mage cast inflicts Frost equal to two thirds of the Mana spent, and published Debuff Mages comps run it. On a medium sample, its runs win more often than most Unique relics and rank among the better Banners.
Each relic is compared with the relics that reach you at the same point of a run, across the runs players share, and with the strongest published comps. Reviewed on patch 0.5.12; the whole ranking is on the relic tier list.
Where it sits
- It pays per cast, so Mana Regen decides how often it fires.
- Its effect plays into Frost, as do 18 other relics in the database.
- It belongs to the Mage family: 20 relics and items are built around that class, and 4 of the 25 heroes start in it.
- It appears in one of the 9 builds on the current tier list: Debuff Mages.
Combos
- It puts Frost on the board, and these pay for it: Amulet of Storms, Frost Ascendancy, Frost Conduit, Glacial Guard Prism, Mage's Elemental Banner, and Thermal Inverter.
- In Debuff Mages on the tier list it runs next to Sentinel's Plate, Frontline Embiggener, Acceleration Filigree, Harmony Crystal, Burning Spiral Engine, and Poison Conduit.
- The guild that runs it in Debuff Mages: Funke, Zuri, Aria, and Rowan.
Where it drops
No drop source recorded in the game files.
Other Unique relics
Questions people ask
What does Mage's Frostbite Banner do in Guildrun?
Whenever a Mage casts, they inflict Frost on their target equal to 66% of the Mana spent.
What tier is Mage's Frostbite Banner in Guildrun?
Mage's Frostbite Banner is S tier on patch 0.5.12. Every Mage cast inflicts Frost equal to two thirds of the Mana spent, and published Debuff Mages comps run it. On a medium sample, its runs win more often than most Unique relics and rank among the better Banners.
What is the difference between a relic and an item?
Items are equipped by a single hero and take up one of that hero's slots. Relics apply to the entire guild and do not use slots. That makes relics the stronger of the two when a build starts coming together.
How do I increase my team size?
Harmony Crystal raises it by one, up to five. So does each of the fifteen Mandate relics, but those require finishing an objective first, like dealing 15000 auto attack damage or applying 30000 shields. Pick the Mandate that matches what your team already does.
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