Ketria Triome and Raugrin Triome can make one of three different colors of mana, green, blue, or red and blue, red, or white
It wasn't played often enough, playing it rules out other cards, and it is never making a main deck so kind of feels like a utility land pick
Lands (21) Spells (39) 3 Fireball 4 Lightning Bolt 3 Swords to Plowshares 1 Jester's Cap 4 Icy Manipulator 4 Howling Mine 3 Winter Orb 1 Ivory Tower 1 Balance 1 Earthquake 3 Fellwar Stone 1 Detonate 1 Black Vise 2 Shatter 2 Incinerate 1 Elkin Bottle 1 Feldon's Cane 2 Stormbind 1 Zuran Orb Sideboard Justices list was an early precursor to the prison archetype, built to slowly and methodically achieve a near complete mana-lock
Packmate is a good card everywhere, no real need to elaborate on that
I struggled to narrow it down to only 10
If you can find them at MSRP, snap them up, but you should be prepared to pay a fair amount for each