Brainstorm is my final card to make the list, it is subtle and often hard to appreciate the effect it has on a game but is has lots of synergy with many different cards and mechanics and is one of only a few cards that offers the ability to put cards into your library
Phyrexian Arena [one_fourth_last stack="responsive"] [/one_fourth_last] The perennial favourite of black decks for card draw is one that, despite a few reprints, has kept its cost in the $5-$8 range
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Legal Toolbox Buy This Card Notes and Rules Information for Ruzic, Booed but Victorious: Mayhem represents an alternative cost that can be paid to cast a spell from your graveyard if you discarded the card with mayhem that turn
Same for warp, foretell, madness, freerunning, and any other alternative cost that ever gets printed: What you actually end up paying does not change the mana cost or the mana value
If you didnt know, any companion is considered an extra card in your deck
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