Ruination is the first card on this list in that vein, and it's a good one at that
Yes, precisely the weight : some enthusiasts have realized that the envelopes that contain a holographic card weigh more
Cast fear into the hearts of your opponents with all 4 Duskmourn: House of Horror Commander DecksMiracle Worker, Death Toll, Jump Scare!, and Endless Punishment
For the newer infect creatures, the damage is replaced by poison or -1/-1 counters (depending on what the creature is attacking)
All your opponent has to do to avoid taking any damage is cast one spell per turn, and even if they dont, a little bit of damage is hardly worth a whole card
Decks with a commander that costs four mana may avoid 3mv ramp because 3mv ramp wont help play a 4mv commander any faster