This would include Breach itself, Lions Eye Diamond, and Brain Freeze
I'm a huge fan
MAGICS PRIME REAL ESTATE (HONORABLE MENTIONS) That being said, there is a tiny group of honorable mentions that would, by their equivalent market value and scarcity, make up the shortlist for any such expanded Power set
Since Commander tends to be a 4-person format, games drag longer, so the presence of 3- and 4-drops is higher than in other formats, with minimal influence on the 2-drops unless theyre ramp spells, interaction, or similar
I rarely play with tutor effects outside of lands, but I made room in the deck for Summoners Pact mainly to go find Reki if Ive got a couple of cheap legendary cards in my hand and want to rebuild after a battlefield sweeper
This time Im pretty sure its random, as you can search for a 2 of clubs from the yellow deck featuring a Graveler or a Golem, just as an example