The second mode affects only creatures you control at the time it resolves
Some holos can be picked up for just a few bucks, while the top chase cards command real premiums
The puzzle was figuring out how to cast this blue sorcery as an instant, giving you the first crack at a new hand of seven cards and skirting the Time Stop effect this has if you cast it during your own turn
While skipping one-drops is doable, especially in slower decks, not being able to play three-drops as well means that playing Gyruda, Doom of Depths as your companion essentially means that you're guaranteeing you'll cast a maximum of four mana worth of spells (two two-drops) across the first three turns of the game, which is certainly too slow for older formats like Modern and Pioneer, and likely too slow for Standard as well
Is the Sacrifice + Shallow Grave + Scholar of the Ages combo legal to play
It could also increase its strength by sending all other Crystal Beast monsters on the field to the graveyard to gain 1000 ATK, meaning it could gain up to 7000 additional ATK