Supply shortages are not an issue for the latest expansions, but rare Enchanted cards remain elusive and desirable among players
You would use your hand quickly to get your opponent on the ropes, then hammer them with the Scroll now that your mana wasn't busy
It's black and green just like Winding Constrictor because its mana cost has B and G in it
The best use-case is to simply play an evasive creature on turn 2, then you can play Tymna on 3, attack, and immediately draw a card
Blue Mana Ramp for Instants and Sorceries (Curious Homunculus, Karfell Harbinger, Unblinking Observer, Volshe Tideturner) Given how intertwined blues color identity is with instants and sorceries, Im really glad to see Wizards of the Coast dipping their toes into conditional mana dorks that can only use their mana for these types of spells