Sensei's Divining Top + Traxos, Scourge of Kroog + Mystic Forge + Song of Freyalise

Sensei's Divining Top

Traxos, Scourge of Kroog

Mystic Forge

Song of Freyalise

How it works

1. Activate Traxos by tapping it, adding 1.
2. Activate Sensei's Divining Top's second ability by tapping it, causing you to draw a card and put Sensei's Divining Top on top of your library.
3. Cast Sensei's Divining Top from the top of your library by paying 1.
4. Traxos triggers, untapping itself.
5. Repeat.

This elegant loop turns the top of your library into an endless engine by leveraging Mystic Forge to peek and cast directly into the void. You activate Sensei's Divining Top to draw a card and slide itself back onto your library, where Mystic Forge lets you recast it for a single mana. Meanwhile, Traxos, Scourge of Kroog starts tapped and dormant, but its trample and massive body find purpose here by using the mana-producing ability granted by Song of Freyalise's first two chapters; every time you recast the Top, Traxos sees the historic artifact spell and untaps itself to pay the tab.