Official card artwork from the community STS2 data source.
Card Guide
Necro Mastery
Cost: 2RarePowerNecrobinder
Card Effect
Summon 5. Whenever Osty loses HP, ALL enemies lose that much HP as well.
Upgrade
summon: +3
When to Pick Necro Mastery
Necro Mastery is a 2-cost power card for the Necrobinder. Powers offer lasting value across the entire fight. Pick this when your deck needs scaling.
When to Skip
Powers require a setup turn. If your deck lacks defense or needs to act immediately, skip until you have the energy to spare. This card provides no direct damage, block, or draw. It is a situational pick — prioritize basic needs first.
Upgrade Value
Low upgrade priority. summon: +3 — the changes are minor.
Synergies
No automatic synergies detected. Try pairing with same-character and same-keyword cards.