Raw attrition and the previously dominant discard spells in Modern fail because of Urzas Saga
Anytime a big creature is declared as an attacker, tap Royal Assassin to send it to the graveyard
Modal Double-Faced Cards (MDFCs) presented a choice between two modes as they are played, essentially netting you the possibility of having a second card, or even more as in the case of Valakut Awakening // Valakut Stoneforge, for the price of one
If you do, return this card from your graveyard to the battlefield tapped and attacking
Cycling cards in and out of my graveyard, playing face-down creatures and morphing them up, and even picking up counters and putting them somewhere elseas long as my hands are moving, Im happy
These proofs will be numbered on the back and signed