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
In this deck that's Peter Pan, Never Landing and Pongo, Ol' Rascal, and if the player doesn't have anything that can challenge them, they're able to vacuum up points unimpeded
Nicol Bolas's +2 ability exiles cards from the top of an opponent's library until he/she exiles a non-land card
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
Each of those effects can be relevant if you're running a deck that likes self-mill