You can't add Wastes to your card pool in the same way that you can add other basic lands
Here is the breakout for the two cards that you get in this slot, noting that any percentage listed is the possibility for getting the cards in the two slots total, so the percentages will add up to a total of two cards: 20 MH3 extended-art rares (45.4%) and 1 MH3 extended-art mythic rare (1.1%) The borderless treatments that show up, including 20 rare (29.6%) and 3 mythic rare (2.8%) borderless frame break cards, 10 rare (18.2%) and 5 mythic rare (4.6%) borderless profile cards, 3 mythic rare (1.7%) borderless concept Eldrazi cards, and other borderless cards, such as 5 rare (5.7%) fetch lands, 5 other rare (11.4%) lands and 1 other mythic rare (1.1%) land, and 5 mythic rare (5.7%) DFC planeswalker cards
(2023-02-04) Permanents phase back in during their controller's untap step, immediately before that player untaps their permanents
Its great at clearing the way for attacks with its first two chapters, before offering one last burst of damage with the last one
If your Commander costs four or five, run nine ramp spells, and if it's six or more run 10