Flash + Protean Hulk + Skill Borrower + Kiki-Jiki, Mirror Breaker + Goblin Recruiter + Torch Courier + Mogg Fanatic

Flash

Protean Hulk

Skill Borrower

Kiki-Jiki, Mirror Breaker

Goblin Recruiter

Torch Courier

Mogg Fanatic

How it works

1. Cast Flash, putting Protean Hulk into play.
2. Protean Hulk goes to the bin and gets Skill Borrower, Torch Courier and Goblin Recruiter.
3. Goblin Recruiter puts Kiki-Jiki on top of your library.
4. Sacrifice the Torch Courier to give Skill Borrower haste.
5. Use Skill Borrower's ability to use Kiki's ability: making another copy of Skill Borrower.
6. Repeat step 5 infinitely.
7. This creates infinite skill borrowers that are tapped, plus 1 that is untapped.
8. Use the last Skill Borrower to copy Goblin Recruiter to put Mogg Fanatic on top of your library, and then sacrifice all your Skill Borrowers to their own ability to deal Infinite damage to your opponent.