All of these cards have achieved near legendary status over the years
Null Rod Null Rod is pretty much a sideboard card thats aimed at stopping the Karn Echoes decks, but I think that th eprice for this card is more dictated by Vintage
A creature can only deal damage to a creature that is blocking it, or the player which it has been assigned to attack, during the combat phase
Not only does it reward you for sacrificing them by reanimating them, but it also provides a sacrifice outlet that triggers payoffs like Midnight Reaper and Blood Artist three times
A Glacial Chasm being played on your opponents board shouldnt mean youre now entirely out of the game, and your opponents definitely dont need to untap with their Nykthos, Shrine to Nyx too often either
Additionally, for each card discarded this way, creatures you control get +1/+0 until end of turn