Glaring Fleshraker's first ability triggers, creating a 0/1 Eldrazi Spawn creature token.
When the Eldrazi Spawn enters, Glaring Fleshraker's second ability triggers, dealing 1 damage to each opponent
When Sensei's Divining Top enters, Skyswimmer Koi triggers.
Holding priority, activate Sensei's Divining Top by tapping it, causing you to draw a card and put Sensei's Divining Top on top of your library.
Resolve the Skyswimmer Koi trigger, causing you to draw Sensei's Divining Top from your library, and then discard a card other than Sensei's Divining Top.
Activate the Eldrazi Spawn by sacrificing it, adding C.
Repeat
This clever loop turns the unassuming Sensei's Divining Top into an engine of endless iteration by using Skyswimmer Koi to instantly draw it back after activation, ensuring you never run out of ammo. As you repeatedly recast the artifact, Glaring Fleshraker provides the necessary mana through its Eldrazi Spawn tokens while simultaneously turning every single loop into a barrage of damage for your opponents.