Basically the strategy is a more restrictive value based around a card type to get the most value out of the deck
Consign to Memory is leagues better than Ceremonious Rejection, because as well as the hard counter for colorless spells, it can counter triggered abilities
Even at the floor level for this card, it will allow you to Flash in creatures ready to attack on your turn
Angel's Grace | Illustration by Zoltan Boros Split second essentially means as long as this spell is on the stack, players can't cast other spells or activate abilities that aren't mana abilities. That's the reminder text for the ability, and it's pretty good
So, blue-green , white-green , and white-red would be the norm
But most decks need to pay a pretty penny for the good tutors