Many ideas and mechanics that used to be silver-border are now printed in black-bordered sets, sometimes 1-for-1 When people approach me about silver-bordered cards in Commander, the most common topics are (in no particular order) Host/Augment (and Surgeon General Commander), Acornelia, Krarks Other Thumb (and other coin flipping/dice rolling cards from Unglued), and Contraptions
While not on the stack, such a card is multicolored
Later in the game, the impact of this card is reduced a bit, since just one mana probably won't make that big of a difference on turn fifteen or more, but the explosive early game it can provide is impossible to ignore
Scores of favorite cards will get shoved aside from existing decks in favor of new ones and legendary creatures of several color combinations are wondering if theyll be replaced by a new boss
This is the rarest pull in any OPTCG product released to date