The shaves to the typical manabase likely form some combination of Ancient Ziggurat or Unclaimed Territory for a Sunbaked Canyon, and possibly the Island for the Waterlogged Grove, but I will need to go into the lab to figure out the right formula
This can be compensated for with creature and utility lands to some extent but it will hurt your speed or your consistency to do so and is especially dangerous to do so heavily in a 15 land deck
Lets hop aboard our airship and go collect some crystals
If we cast Sigarda on turn four, and attack on turn five, we have at minimum drawn our opening hand of seven cards, plus one for each turn
If you discover an adventurer card, split card, or modal double-faced card, you might be able to cast that card with either set of characteristics depending on the effect's discover value
Toughness matters theme mixed with Food tokens is hopefully a viable option, but it takes a bit of playtesting to find a path