Averna, the Chaos Bloom
Legendary Creature — Elemental Shaman
"Soil and stone, hear my call! Branch and bone, yield your all!"
Legal in
Legacy, Vintage, Commander, Brawl, Historic
Rulings (11)
If you don't cast the nonland card you reveal, or if you don't reveal any nonland cards with lesser mana value, you can still put a land card onto the battlefield before you finish cascading.
2020-11-10
Averna's ability isn't the same as playing a land. You may do this even if you've already played a land during your turn and even if it isn't your turn at all.
2020-11-10
If you cast a card "without paying its mana cost," you can't choose to cast it for any alternative costs. You can, however, pay additional costs. If the card has any mandatory additional costs, you must pay those to cast the card.
2021-06-18
Due to a 2021 rules change to cascade, not only do you stop exiling cards if you exile a nonland card with lesser mana value than the spell with cascade, but the resulting spell you cast must also have lesser mana value. Previously, in cases where a card's mana value differed from the resulting spell, such as with some modal double-faced cards or cards with an Adventure, you could cast a spell with a higher mana value than the exiled card.
2021-06-18