Ajani, Sleeper Agent — ruling 1

A hybrid Phyrexian mana symbol is counted the same way as a normal mana symbol when determining the mana value of a card. Specifically, Ajani’s mana value is always 4, even if you pay {1}{G}{W} and 2 life to cast him.

Ajani, Sleeper Agent — ruling 2

Phyrexian is not a color nor a type of mana, and players cannot add Phyrexian mana. It’s just a symbol that gives you another way to pay for a spell or ability.

Ajani, Sleeper Agent — ruling 3

Compleated is a replacement effect, and it applies only to a permanent that is entering the battlefield with loyalty counters. Any other replacement effect that would apply to the number of loyalty counters it enters the battlefield with will apply as normal.

Ajani, Sleeper Agent — ruling 4

The compleated ability looks only at whether a player chose to pay 2 life for a Phyrexian mana symbol as they were casting the spell. If a player paid life for some other reason while casting the spell, that will not reduce the number of loyalty counters the planeswalker enters the battlefield with.

Ajani, Sleeper Agent : règles, fonctionnement et interactions (MTG)

Ajani, Sleeper Agent is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Compleated ( can be paid with , , or 2 life. If life was paid, this planeswalker enters with two fewer loyalty counters.) +1: Reveal the top card of your library. If it's a creature or planeswalker card, put it into your hand. Otherwise, you may put it on the bottom of your library. −3: Distribute three +1/+1 counters among up to three target creatures. They gain vigilance until end of turn. −6: You get an emblem with "Whenever you cast a creature or planeswalker spell, target opponent gets two poison counters."

How it works : Ajani, Sleeper Agent

Original English text — Wizards of the Coast / Scryfall

#1September 9, 2022· Wizards of the Coast
A hybrid Phyrexian mana symbol is counted the same way as a normal mana symbol when determining the mana value of a card. Specifically, Ajani’s mana value is always 4, even if you pay and 2 life to cast him.
No other card is named in this ruling.
#2September 9, 2022· Wizards of the Coast
Phyrexian is not a color nor a type of mana, and players cannot add Phyrexian mana. It’s just a symbol that gives you another way to pay for a spell or ability.
No other card is named in this ruling.
#3September 9, 2022· Wizards of the Coast
Compleated is a replacement effect, and it applies only to a permanent that is entering the battlefield with loyalty counters. Any other replacement effect that would apply to the number of loyalty counters it enters the battlefield with will apply as normal.
No other card is named in this ruling.
#4September 9, 2022· Wizards of the Coast
The compleated ability looks only at whether a player chose to pay 2 life for a Phyrexian mana symbol as they were casting the spell. If a player paid life for some other reason while casting the spell, that will not reduce the number of loyalty counters the planeswalker enters the battlefield with.
No other card is named in this ruling.