Day 1 Chamber deck.
I don't care for Ramp, so went with a cope route that lets me play Nick Fury & MANTIS.
Mantis is to yoink an extra 5/6-Cost at the end of the game from your opp.
If you're bad at reads for Mantis, sub with Deafening Chord or Agent 13 (for an extra shot at 5+ cost card).