Marvin Paranoid Android

Deathtouch
Creatures don’t die when getting below 0 toughness.
Whenever one or more +1 counter would be put on a permanent your opponent controls instead put a -1/-1 counter on Marvin Paranoid Android or a permanent you control, if you don’t put those counters on the original target for those counters an opponent controls.
{ut}{x} reduce life of an opponent where X Is the number of -1 counters on the battlefield.