Above all keep your love for the game alive by protecting your collection
Trying to trigger your Teval, the Balanced Scale
In a Two-Headed Giant game, Twilight Prophet's last ability causes the opposing team to lose twice X life and you gain X life
Feldon of the Third Path can enable some explosive interactions, and Sams looking to get value creatures into his graveyard quickly
This doesnt only include the core design of the card, but also new mechanics that can change how cards have traditionally looked (Planeswalkers, DFC, and meld for examples), new card/frame layouts, and special treatments
This can be an especially useful card in decks that already have an expendable board like Anhelo, The Painter or Lagomos, Hand of Hatred, or in spellslinger everything can be reused decks with commanders like Kess, Dissident mage