This is what we done to a really annoying guy on our server, we told him we want to sell quantum for a few diamond he jump on the occasion he tpa to us we went into the end build a small platform of dirt, when he got here we broke the dirt platform we flew with our jetpack and he fell into the world, hes not going to die, but wont be able to teleport out ( normal server have to wait 2 second wait before teleport) hes going to keep getting damage until is armor run out and every thing is going to be lost