Knowing what hands to keep is one of the biggest learning curves early on, so making things simpler in that department can be helpful when youre just starting out
You can call it canon at any time because thats what the multiverse implies, but at the same time those promotional cards were just card styles and not actual standalone cards like the Street Fighter or Walking Dead Secret Lairs
For example, characters like Aang, Katara, and Sokka all have a card dedicated to them in one or two colors, gradually progressing to three or more colors
Summon: Esper Valigarmanda Mana Value: 3R Rarity: Rare Type: Enchantment Creature Saga Drake Stats: 3/3 Card Text: I Exile an instant or sorcery card from each graveyard
Turns out, there's really just not many ways, and playing this card is as rough as it seems
Banding is no longer printed on regular cards because its a confusing mechanic that lends itself to a playstyle thats no longer relevant in Magic