(2021-07-23) If you cast a card without paying its mana cost, you can't choose to cast it for any alternative costs
(2023-02-04) If a player or permanent has more than one kind of counter on it, and you choose for it to get additional counters, it must get one of each kind of counter it already has
To make certain of a proper fit, substantiate your card format before acquiring sleeves or display cases
Electricity is a natural counter to water conductors and airborne foes, so Lightning cards often take the upper hand here
Once you inevitably start exploring formats outside of just Standard or Modern and dig through older cards, promos, bonus sheets, serialized cards, alternate treatments, and whatever stunning nonsense Wizards decided to put in Collector Boosters this time around, rarities will start looking a bit messier