Neutron Aegis

RegentPowerRare
Gain 8 Plating.

Costs 1 Energy and 5 Stars, and gives 8 Plating, 11 upgraded.

  • Block: at the end of each of your turns, before end-of-turn damage, you gain Block equal to your Plating.
  • Decay: at the start of each turn after the first, Plating drops by 1.
  • Payout: Eight Plating pays 8, then 7, then 6, and so on: 36 Block over eight turns, 66 for the upgraded 11.
  • Stacking: Plating stacks by amount with other sources, and does not go through Dexterity.
Character
Type
Power
Rarity
Rare
Cost
1 Energy
Star cost
5 Stars
Target
Yourself

When to take Neutron Aegis

A boss card: the Star cost is most of a fight's income, and the return only beats a Defend after two or three turns. Take it when the deck makes Stars quickly and expects a long fight.

Cards that synergize with Neutron Aegis

Royal Gamble
Skill
0
5
Gain 9 .
Exhaust.
Royal Gamble gives 9 Stars at once, enough on its own.Gain 9 .
Exhaust.
Genesis
Power
2
At the start of your turn, gain .
Genesis and Hidden Cache rebuild the Stars.At the start of your turn, gain .
Hidden Cache
Skill
1
Gain .
Next turn, gain .
Genesis and Hidden Cache rebuild the Stars.Gain .
Next turn, gain .
Child of the Stars
Power
1
Whenever you spend , gain 2 Block for each spent.
Child of the Stars pays 10 Block for the 5 spent.Whenever you spend , gain 2 Block for each spent.
Black Hole
Power
1
Whenever you spend or gain , deal 3 damage to ALL enemies.
Black Hole deals 15 to everyone on the spend.Whenever you spend or gain , deal 3 damage to ALL enemies.
Knockout Blow
Attack
3
Deal 30 damage.
If this kills an enemy, gain .
Knockout Blow gains Stars, which pay for Neutron AegisDeal 30 damage.
If this kills an enemy, gain .
Shining Strike
Attack
1
Deal 8 damage.
Gain .
Put this card on top of your Draw Pile.
Shining Strike gains Stars, which pay for Neutron AegisDeal 8 damage.
Gain .
Put this card on top of your Draw Pile.
Venerate
Skill
1
Gain .
Venerate gains Stars, which pay for Neutron AegisGain .
Big Bang
Skill
0
Draw 1 card.
Gain .
Gain .
Forge 5.
Exhaust.
Big Bang gains Stars, which pay for Neutron AegisDraw 1 card.
Gain .
Gain .
Forge 5.
Exhaust.
Gather Light
Skill
1
Gain 8 Block.
Gain .
Gather Light gains Stars, which pay for Neutron AegisGain 8 Block.
Gain .
Glow
Skill
1
Gain .
Draw 1 card.
Next turn, draw 1 card.
Glow gains Stars, which pay for Neutron AegisGain .
Draw 1 card.
Next turn, draw 1 card.
Solar Strike
Attack
1
Deal 9 damage.
Gain .
Solar Strike gains Stars, which pay for Neutron AegisDeal 9 damage.
Gain .
The Sealed Throne
Power
1
3
Whenever you play a card, gain .
The Sealed Throne gains Stars, which pay for Neutron AegisWhenever you play a card, gain .
Crescent Spear
Attack
1
1
Deal 8 damage.
Deals 2 additional damage for ALL your cards that have a cost.
Crescent Spear triggers when you spend Stars, and Neutron Aegis spends themDeal 8 damage.
Deals 2 additional damage for ALL your cards that have a cost.

Relics that synergize with Neutron Aegis

Gorget
Gorget adds 4 more Plating at the start of every fight.At the start of each combat, gain 4 Plating.
Divine Destiny
Divine Destiny gains Stars, which pay for Neutron AegisAt the start of each combat, gain .
Divine Right
Divine Right gains Stars, which pay for Neutron AegisAt the start of each combat, gain .
Lunar Pastry
Lunar Pastry gains Stars, which pay for Neutron AegisAt the end of your turn, gain .
Galactic Dust
Galactic Dust triggers when you spend Stars, and Neutron Aegis spends themFor every 10 spent, gain 10 Block.
Mini Regent
Mini Regent triggers when you spend Stars, and Neutron Aegis spends themThe first time you spend each turn, gain 1 Strength.
Permafrost
Permafrost triggers on Powers played, and Neutron Aegis is oneThe first time you play a Power each combat, gain 7 Block.
Lost Wisp
Lost Wisp triggers on Powers played, and Neutron Aegis is oneWhenever you play a Power, deal 8 damage to ALL enemies.
Mummified Hand
Mummified Hand triggers on Powers played, and Neutron Aegis is oneWhenever you play a Power, a random card in your Hand is free to play that turn.
Game Piece
Game Piece triggers on Powers played, and Neutron Aegis is oneWhenever you play a Power, draw 1 card.

Changes by version

  1. 18 Dec 2025Star cost85Internal playtest
    Star cost decreased from 8 to 5 and plating lowered from 15(20) to 8(11
  2. 18 Sep 2025ArtInternal playtest
    Added portrait art
  3. 6 Feb 2025Cost01Internal playtest
    Cost changed from 0 to 1 and in addition to Star cost
All 9 patch notes6 older
  1. 16 Jan 2025ReworkInternal playtest
    Reworked the card
  2. 9 Jan 2025Block20(25)15(19)Plating10(13)15(19)Internal playtest
    Block gain decreased from 20 to 15 (upgraded 25 to 19) and Plating increased from 10 to 15 (upgraded 13 to 19)
  3. 7 Nov 2024Bug fixInternal playtest
    Neutron Aegis card now has Block hovertip
  4. 1 Nov 2024ReworkInternal playtest
    Reworked Neutron Aegis card
  5. 23 Aug 2024Bug fixPlatingInternal playtest
    Added Plating hovertip to Neutron Aegis card
  6. 16 Aug 2024AddedInternal playtest
    Added to the game

Internal playtest notes are from before the Early Access release. Names and numbers in them can differ from the game today.

Purchase today
If you haven't bought Slay The Spire 2 yet, it's time. Support the devs, they made an amazing game.Get it on Steam