mtg commander deck creator Magic: The Gathering Doctor Who GRIXIS MAESTROS Blue/Black/Red Mana Commander

Like convoke, improvise itself taps the creature so you can use an artifact to pay for improvise as soon as it hits the battlefield

Thalia's Lieutenant pumps up all of your creatures, and then grows even larger itself

Unblockable Our creature package is extremely low to the ground with three 1-drops, one 2-drop, and one 3-drop

If youre worried about losing your exerted character from your opponents challenging it, just make sure you banish everything that could challenge it with Grab Your Sword or any of your own direct challenges

If this is compared to Consecrated Sphinx which generally gets at least two cards and is likely averaging about 5 per cast you can see why I don't think this is over powered