Originally, the Glass Casket could capture any size creature, but playtesting showed that was a little too strong, so rather than raise the cost, we limited it to creatures of converted mana cost 3 or less
Creatures of any color can make colorless mana if you prefer
Whether a part of control, aggro, tempo, or combo decks, Brainstorm was an absolutely defining force in Vintage until its eventual restriction, and to this day, is clearly way, way over the line for Legacy, except that it just gets a pass, because we want it
Case of the Uneaten Feast White lifegain always wants this kind of effect, and getting a turn to do some kind of Lurrus of the Dream-Den/Underworld Breach stuff to get back your Voice of the Blessed that met its fate far too soon is reasonably big game for those decks
We mean it when we say weve got it all
This Green instant grants permanents you control hexproof and indestructible until the end of the turn