There are some reprints here that feature updated rules text and typesetting to make them easier to understand and play in the Limited environment
Effect on Limited Common is for cards that are the backbone of Limited, things that are necessary to make the format work
Something like Revel in Riches can net you a quick win and its still a decent Treasure generator
Speaking of prowess, the creature side of Elusive Otter has that keyword ability, and it also cant be blocked by creatures with power less than its power, making for an elegant and highly synergistic card, especially when paired with more Otters
Such restriction means that you can activate the ability only if you have priority, during you main phase and only if the stack is empty
In singleton formats, that kind of precision is why you play it, no matter what MTG color combinations youre running (as long as it includes black)