You may cast Dragon spells and artifact spells as though they had flash.
Choose a Background (You can have a Background as a second commander.)
Renari turns your Dragon and artifact spells into instants, letting you hold up interaction and slam threats on opponents' end steps to play reactive blue control while still developing a board. You durdle early with counterspells, card draw, and mana rocks, then flash in Dragons and powerful artifacts at the most disruptive moment.
Casting big threats at instant speed makes your mana incredibly efficient and hard to play around
Plays perfectly into blue's control shell of counterspells and instant-speed interaction
Background slot lets you tune the deck's second color/identity for ramp, card advantage, or aggression
Flash artifacts let you ambush with equipment, board wipes-in-a-box, or game-ending mana rocks
Mono-U (or near it) gives access to the best card draw and countermagic in the format
Mono-blue lacks efficient removal for permanents and struggles against resolved enchantments and big creatures
Renari himself does little when not casting Dragons/artifacts and is a fragile 4-drop
Dragon count in mono-U is thin, so you lean heavily on artifacts to feel the payoff
Reactive gameplans can fall behind fast, proactive boards without a real engine
Vulnerable to graveyard-light, no recursion in mono-blue once threats are answered
Generates a flying army from your artifact spells, giving Renari decks a real token wincon.
Add more truly impactful flashable artifacts (Smothering Tithe, Mind's Eye, big mana rocks) and the few premium blue Dragons to maximize Renari's text. Lean into a tight counterspell suite (Swan Song, Fierce Guardianship, Mana Drain) and tutors like Whir of Invention/Trinket Mage to find your best artifact at instant speed. Pick a Background that shores up blue's weaknesses—removal or ramp—and consider Cyclonic Rift, Rhystic Study, and Mystic Remora as the high-impact staples that turn the deck competitive.
Legendary Creature — Dragon Artificer
