Milio will function similar to his LoL counterpart where he acts as an engine to buff up a strong ally to do the fighting.

Ive tried to design him as a support style deck, so he wants you to target allies a lot. This should synergize with decks like Sivirs and Akshans with their Lucky Finds.

Milio's got some focus on empowerment to make use of gaining stats on a strong ally, some Support so he can funnel more resources into an ally. If his buffed ally keeps getting hit by blockers it won't be a problem thanks to Impact which is similar to how his passive works in LoL.

Finally ofc since he's from Ixtal his spells will be elemental, and he'll get more buffs for his allies for using Elemental spells

Hopefully, the costs and stats make sense, other cards will come later
-------------

Warmth Cards

(2)(burst)Spirit Fuel Warmth (Elemental): Remove an enemy’s positive keywords this round, giving an ally +1|0 per keyword.

(1)(focus)Glowing Warmth (Elemental): Reduce the cost of the next elemental card you play by the target ally’s power this round

(2) (focus)Kindling Warmth (Elemental): give an ally +2|+0. Remove their negative keywords.