mtg elder dragon commander deck Legends: Battle For Baldur's Gate - The Ur-Dragon Commander EDH *DRAGONS*

Celestine, the Living Saint Alas, Celestine is our lone mono-white representative

Mana isn't as scary as card advantage in abundance

These days there are a ton of ways to get cheap artifacts in Mardu decks, and Jan will combo out with the artifact untapper, Clock of Omens and Liquimetal Torque

Proliferate also gives it synergies in other counter decks like planeswalkers with loyalty or +1/+1 counters and it's in both color combos for those archetypes

Any control or midrange deck is hungry for life gain, being able to pack Incinerate, Searing Spear etc with a free three life in your deck goes a long way

They often reward you for casting instants and sorceries, drawing extra cards, or chaining spells together, which fits perfectly with the Izzet Guilds fast, experimental, and explosive style of magic