You can choose up to four lands, no matter who controls any of them
Serum Powder specifically talks about mulliganing (the only card currently in Magic that does) so the template just asks for it to be in your hand as no other time but your opening hand would matter, so it didn't need to be spelled out
But the set had room for only one white-black card, and because Selenia, Dark Angel was crucial to the story, she won out
This cycle could be repeated at the end of an opponents turn so long as you had enough mana to pay for it, effectively creating a near-infinite source of 1/1 fliers and a ton of healing
Other cards with Crimson Dive Cards by Nurikabe Frequently Asked Questions How can I obtain the Mega Charizard Y ex with 3-Stars rarity from the Crimson Blaze set
Self-Bounce a Creatures (16) Entity Tracker x2 Fear of Isolation x4 Nurturing Pixie x4 Optimistic Scavenger x4 Spyglass Siren x2 Instants (6) Cut Down Go for the Throat This Town Ain't Big Enough x4 Enchantments (15) Hopeless Nightmare x4 Nowhere to Run x4 Sheltered by Ghosts x3 Stormchaser's Talent x4 Lands (23) Adarkar Wastes x2 Concealed Courtyard x4 Darkslick Shores x4 Gloomlake Verge x2 Island x2 Meticulous Archive x3 Seachrome Coast x4 Underground River x2 Sideboard (15) Destroy Evil x2 Kaito, Bane of Nightmares x2 Loran of the Third Path Pest Control x2 Rest in Peace x3 Split Up Sun-Blessed Healer x2 Tithing Blade x2 I love a deck that turns drawbacks into advantages