This only needs to make a single mana a turn to have similar value to a Llanowar Elves, which is a fine floor when you consider the cards ceiling of an extra 3 or 4 mana a turn
This feels like a three-drop on curve dork that can lead, or participate in, Hate Bears brews around things like Aven Mindcensor and Esper Sentinel
This nine-mana Enchantment Creature - Saga Dragon brings the heat in four epic steps: destroy a nonland permanent, draw two cards, then slam a 9/9 flying body whose Mega Flare deals damage equal to the total mana value of your other permanents to each opponent
That alone fulfills both this paragraph, and the next
Assuming this is the first time in Undercity, you get to search up a basic land to your hand and draw a card
(Big Furry Monster) from the satirical Unglued set "only" gets 99 power