Most CCGs or TCGs (you can find out more about these terms in our whats the difference between TCG and CCG article) feature cards with special treatments and holographic, or holo, foil treatments are among the most commonly found across all games
For example, once we get some "draw a second card" creatures on the battlefield, it's usually best to cast Consider during our turn even though it's an instant since it, plus our draw step, will give us the two cards we need to trigger all of our payoffs
(2021-03-19) Casting a spell with split second won't affect spells and abilities that are already on the stack
If you dont have anything in your discard pile, you can add to it by using Sonic Drive (while also doing damage)
Results can be numbers not ordinarily possible on a six-sided die
Other than a stint on the List, Keeper of the Nine Gales has never had a reprint since, so it makes perfect sense that it was susceptible to a spike