Delney, Streetwise Lookout - 2W
Legendary Creature - Human Scout (Mythic)
Creatures you control with power 2 or less can't be blocked by creatures with power 3 or greater.
If an ability of a creature you control with power 2 or less triggers, that ability triggers an additional time.
"It's not a matter of what I know. It's a matter of making it worth my while to tell you."
2/2
Just thinking out loud here, this list needs to be trimmed by about half but I think we want some combination of these creatures:
And Loran of the Third Path in the sideboard. We'll keep Rite of Oblivion for removal and Corrupted Conviction as a cheap card-drawing sacrifice outlet. Nothing here costs more than 3 mana so maybe we can get away with about 22 lands.
It's tricky because there are a lot of good creatures with triggered abilities that give them +1/+1 counters, but once you do that you immediately shut off the synergy with Delney.
I also really want to figure out how to break [[Circuit Mender]], and Delney might help with that, but I don't know if this is the deck for it.
[[card name]] to call
Okay, maybe something like this for the Circuit Mender deck:
2 Miner's Guidewing
4 Spyglass Siren
4 Thousand-Faced Shadow
3 Faerie Mastermind
4 Moon-Circuit Hacker
4 Suspicious Stowaway
2 Abuelo, Ancestral Echo
3 Circuit Mender
4 Delney, Streetwise Lookout
3 Loran's Escape
4 Get Lost
23 lands
Not sure this is enough interaction though. I don't feel like we have a great plan for if the opponent plays Sheoldred, as Standard opponents are wont to do.