The ability to make extra copies of legendary creatures (either temporarily or permanently) is something thats become more commonplace in the last few years in blue
3 Tomb Raider Secret Lair So Many Treasures Just Ready For The Taking Lara Croft, Tomb Raider The classic gaming icon, Lara Croft came to Magic: The Gathering in a special Secret Lair
You can just play a snow land from your graveyard, too
That three extra mana you didnt have to actually pay can now be spent on a threat like Teferi or Phlage, double-spelling way ahead of what would normally be possible with basically no downside
While there are a number of creatures across the Bloomburrow set thatll let you populate your nest, Family Matters face Commander Zinnia, Valleys Voice plays stork for all the critters in Valley
Outside of Kaldheim I reckon we'll see more in the way of Izzet decks making use of foretells to play cheap instants and sorceries, with cards like Double Vision and Spellgorger Weird both benefitting greatly from having a large library of foretold spells ready to go