We also need a very high overall creature count to be consistently discarding them for Sefris triggers, and playing mana rocks (which is almost 100% of our ramp options for Esper) will just make our favorite shortcut through the Oubliette more painful
The Lost Caverns of Ixalan - popular with players who like dinosaurs, artifacts, explore-style adventure themes and fun chase cards
Axebane Guardian and Overgrown Battlement are two cards with similar abilities that any wall deck would want to take advantage of

1 Wildcard of any rarity A common (12.4%), uncommon (64%), rare (16.8%), or mythic rare (2.1%) card from the main set A common (less than 1%), uncommon (2.7%), rare (less than 1%), or mythic rare (less than 1%) scene card A rare (less than1%) or mythic rare (less than 1%) logo card A rare (less than 1%) or mythic rare (less than 1%) panel card A rare borderless land (1%) 1 Rare or mythic rare card A rare (76.1%) or mythic rare (16.6%) card from the main set A rare (1%) or mythic rare (0.8%) scene card A rare (2.4%) or mythic rare (0.7%) logo card A rare (1.9%) or mythic rare (less than 1%) panel card 1 Traditional foil card of any rarity A common (59.9%), uncommon (29.6%), rare (5.9%), or mythic rare (1.2%) card from the main set A common (less than 1%), uncommon (1.2%), rare (less than 1%), or mythic rare (less than 1%) scene card A rare (less than 1%) or mythic rare (less than 1%) logo card A rare (less than 1%) or mythic rare (less than 1%) panel card A rare borderless land (less than 1%) 1 Non-foil or traditional foil land card A non-foil (40%) or traditional foil (10%) common dual land A non-foil (20%) or traditional foil (5%) default frame basic land A non-foil (10%) or traditional foil (2.5%) city calm basic land A non-foil (10%) or traditional foil (2.5%) city chaos basic land 1 Non-foil helper card (8.5%) or double-sided token (91.5%) Note: Percentages may not sum to 100 due to rounding

As long as you're using mana rocks or Treasure as your mana sources, Shadow can significantly reduce the mental load of playing Magic , since you rarely need to worry about your opponents responding to your spells