Collapsing Borders
Mana cost
Mana value4TypeEnchantment
Color identity
Red
RarityRare
SetInvasion (INV)
ArtistGlen Angus
Price€0.47 · foil €4.46 · $0.36
Collapsing Borders 

Enchantment
Domain — At the beginning of each player's upkeep, that player gains 1 life for each basic land type among lands they control. Then this enchantment deals 3 damage to that player.
Legality
CommanderLegalStandardNot legalPioneerNot legalModernNot legalLegacyLegalVintageLegalPauperNot legalBrawlNot legalOathbreakerLegalHistoricNot legalTimelessNot legalPenny DreadfulNot legal
Rulings
2021-06-18
Domain abilities count the number of basic land types among lands you control, not how many lands you control or how many of any type.
2021-06-18
The basic land types are Plains, Island, Swamp, Mountain, and Forest. Land types other than basic land types (such as Desert) don't contribute to domain abilities.