If you're already in the last room, complete that dungeon and start a new one
Garruk's Uprising is an essential draw ability attached to an enchantment
Before Khans of Tarkir , delve only existed on three cards: Tombstalker, Logic Knot, and Death Rattle, all of which were reprinted in Modern Masters
Go Wide decks achieve this by playing team-wide pump spells, or any other effect which affects each creature you control. Youre effectively multiplying the impact of the spell by the number of creatures you control, without paying any additional costs and its not very hard to control a LOT of creatures if youre really focused on it
the player with the least on their own board might secretly be the one drawing four extra cards a turn and controlling the game
Inalla, Archmage Ritualist gives you temporary copies of your wizards, Azami, Lady of Scrolls turns them all into extra card draw, and Kaza, Roil Chaser gives you cost reduction based on the number of wizzies you control