Deadeye Navigator + Blessed Sanctuary + Phyrexian Altar + Doubling Season

Deadeye Navigator

Blessed Sanctuary

Phyrexian Altar

Doubling Season

How it works

1. Activate Deadeye Navigator by paying 1, blinking it.
2. When Deadeye Navigator enters the battlefield, its soulbond ability and Blessed Sanctuary triggers.
3. Resolve the Deadeye Navigator trigger, pairing it and another creature you control.
4. Resolve the Blessed Sanctuary trigger, creating two 2/2 Unicorn creature tokens.
5. Activate Phyrexian Altar twice by sacrificing the Unicorns, adding 1.
6. Repeat.

This loop spins into motion by leveraging Deadeye Navigator's soulbond ability to repeatedly blink itself and churn the machinery. Every time it returns, Blessed Sanctuary spots the entry and triggers to make a Unicorn token, a process supercharged by Doubling Season to instantly double your squad to two Unicorns instead of one. Those fresh tokens are then immediately fed into Phyrexian Altar to generate the mana needed to pay for the next activation of Deadeye Navigator's blink.