This spell can't be countered.
Flying, vigilance, trample
Players can't cast spells from anywhere other than their hands.
Spells your opponents cast that cost less than five mana to cast and target you and/or spells or permanents you control cost five mana to cast.

Flying
Amity — Whenever you attack with Warden of Soul and exactly one other creature, search your library for a legendary or Dragon card, reveal it, put it into your hand, then shuffle.

The first spell you cast during each of your turns costs {R}{G} less to cast.
You may play two additional lands on each of your turns.
Landfall — Whenever a land you control enters, you may exile the top three cards of your library. You may play those cards from exile as long as you control Warden of Tremors.

Flying
When Warden of Wishes enters, put three wish counters on it, then you gain 7 life.
Whenever you lose life, you may remove a wish counter from Warden of Wishes. If you do, put a card you own from outside the game into your hand.

At the beginning of combat on your turn, you may integrate another creature you control. If you don't, tap Xavvac, Corrupter Core.
Permanents you control with cards integrated onto them have lifelink and deathtouch.

Trample
Whenever you amp it up, double Xeon, BPM Savant's power until end of turn.

As long as it's your turn, Yaeji has first strike.
Whenever you amp it up, exile up to one target permanent card with mana value 3 or less from your graveyard, then create a token that's a copy of it.

{T}: Add {C}{C}.
Whenever you cast a Kraken, Leviathan, Octopus, or Serpent spell, draw a card.

Whenever a counter is put on another creature you control, you may put a counter of the same kind on Zeno. Then if there are no other counters of that kind on Zeno, draw a card. Do this only once each turn.

Flying, ward {1}
Zhovala, Silver Monarch gets +1/+1 for each other Advisor you control and each Advisor card you own in exile.
Whenever another Advisor you control dies, exile it unless an opponent pays {2}. You may cast that card as long as it remains exiled.

Ward—Pay 2 life.
Whenever Zygos attacks, bless target legendary creature you control.