Lim-Dul's Vault costs a blue and a black mana and between zero and twenty life, and sets you up five cards
I did love the preparation, the problem solving and the counterplay, not to mention the more frequently evolving formats in constructed
I've been working on a list of mono-colored decks (that still run robots / artifacts of course)
Oko's direct impact may not be flashy, but the opponent has to answer him - and all the time they're expending resources trying to remove the three-mana planeswalker, his controller can keep building up their own board, getting further and further ahead
These are admittedly better suited for Constructed play, but stacking effects like this in Commander really puts pressure on life totals
Lucky, The 15th Puppy, is an adorable four-cost card whose stats arent incredible - with two willpower, three health and one lore - but its abilities make it well worth including in any amber ink deck featuring dalmatian cards