Since youre already entombing cards, you can take the next step with Reanimate or Living Death
The Vintage players, the Cube drafters, the Commander players will all tell you, they want to have that super-rare card in their decks just for the moment when someone asks if a card is real in a hushed tone of voice
Its not a terrible play, but it requires too much support to enable it properly
Typecycling In Scourge , the third set of the Onslaught block, we introduced a variant on cycling we called [basic land]cycling, where you could spend mana to discard the card and instead of drawing a card, you could get the appropriate basic land from your deck
Each of those effects can be relevant if you're running a deck that likes self-mill
Return of the Wildspeaker gets around both because if an opponent destroys your biggest power creature in response, you will just draw whatever card has the most power in play after that