Summoning Portal Level 4 Arcane 10 mana
Spawnpoint
1 Channeling
Novice
If there is 2 or more mana on summoning portal it may summon 1 creature
As written, this would be possibly the best creature spawnpoint in the game. Most spawnpoints are restricted to a certain type of creature, and the broader the type, the greater the other restrictions (for instance, Gate to Voltari is currently the broadest spawnpoint, able to summon any creature from the arcane school, but requires 3 mana--though this is admittedly pretty easy to get.) And for just 10 mana?
Also, Novice is probably not a trait that you want to put on a level 4 spell.
So something like this?
Similar name/theme, but not a spawnpoint since it provides no action. I think the OP wants an action generator.