Your_average_minecrafter summons/(gives a spawn egg) a creeper that's powered has max explosion radius and lit (perhaps slider for fuse time?) or even better a fireball since so causes a lot more damage and have fire making them even lagger
Cyclopropinon Your_average_minecrafter more generalized: .give it should do the same as /give, but doesnt need perms, just being creative. then u could make a keybind to create custom stuff with https://mcstacker.net/ That would be much more powerful Edit: just realized .give already exists lmao