Activate Kiki-Jiki by tapping it, creating a token copy of All-Fates Stalker.
When the All-Fates Stalker token enters the battlefield, it triggers, exiling Kiki-Jiki until All-Fates Stalker leaves the battlefield.
Activate Phyrexian Altar by sacrificing the All-Fates Stalker token.
When the All-Fates Stalker token dies, Kiki-Jiki is returned from exile to the battlefield.
Repeat.
This clever loop lets you endlessly exploit the trigger of All-Fates Stalker by pairing it with Kiki-Jiki, Mirror Breaker to continually make temporary token copies. Each time a token enters, its ability banishes Kiki-Jiki until that token leaves, setting up a safe exit when you sacrifice the copy to Phyrexian Altar for any color of mana. Because sacrificing the token immediately returns Kiki-Jiki to the battlefield ready to tap again, you generate an endless cascade of mana alongside infinite entry and death triggers.