is this a friend losing combo ?

sac putrid goblin then return it with a -1/-1 counter on it. cast first day of class and give putid goblin +1/+1 and do that again and you make infinite mana then use that mana to make infinite 1/1 rat tokens with song of totentanz

sac putrid goblin then return it with a -1/-1 counter on it. cast first day of class and give putid goblin +1/+1 and do that again and you make infinite mana then use that mana to make infinite 1/1 rat tokens with song of totentanz