Level thinking - how good you are?

[alavet]

hello there,
try to determine hero's action (just in your mind, w/o paper or another sruff) after in this situation (there is would be some mistakes cause english isnt my main language):

I thought that he had thought that i thought that he wouldn't increase with powerful cards and so i ___ ?

i've invented this phrase by myself but i hvnt got an answer without paper. after all, i've made some kind of investigations (about 20 secs in MS EXCEL) and got the answer. i'm too lazy to check it again so i want ideas where is i am with it.