So, spells that give you an attack in 5E tend to specifically state that you can attack on the round you cast the spell. This is true for O5E with spells like Enervation and Witch Bolt, and it has been maintained on A5E on spells like Call Lightning.
This makes Seed Bomb and Cobra's Spit a bit weird, design wise, as they are the only spells I can think of where you basically lose a turn by casting them, as they provide zero benefits until the following turn.
Other spells like Moonbeam and Heat Metal, while different in functionality, also are very much designed with the intention of not making the character waste a turn for the casting.
All this to say, do we know if there is any particular design decision on these two spells, or is it only a design error?
This makes Seed Bomb and Cobra's Spit a bit weird, design wise, as they are the only spells I can think of where you basically lose a turn by casting them, as they provide zero benefits until the following turn.
Other spells like Moonbeam and Heat Metal, while different in functionality, also are very much designed with the intention of not making the character waste a turn for the casting.
All this to say, do we know if there is any particular design decision on these two spells, or is it only a design error?