1300 card binder Stay-Flat Trading focused environments 4/9/12-Pocket PU Card Binder –

If a monster(s) you control is destroyed by an opponent's attack or card effect: You can pay half your LP

The OverwhelmOverwhelm mode on Return of the WildspeakerReturn of the Wildspeaker can also accomplish this

Some of these are problematic with the fundamentals of the format, like Karakass ability to shut off any commander at virtually no cost, or the way Trade Secrets lets you collude with an opponent to each virtually draw your deck

10 Crucible Of Worlds (Borderless, Surge Foil) Behold, The G.E.C.K

Five hybrid mana in both green and white means there are likely better options in the modern game, but its still a good consideration

Vodalian Soldiers here has four different card art, and I chose this one to represent because they are so nicely colourful