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Implement Prototype ability (#11249)

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Prototype is a SpellAbilityType, for which alternate costs are permitted. It has a continuous effect that applies on the battlefield as well as a method to modify the spell on the stack. Permanents have an isPrototyped flag that copy effects can check explicitly (same brittle method as transformed permanents use; reworking copy effects to streamline them is a separate scope).

Many test cases have been added to confirm functionality (thanks to Zerris for additional test suggestions).

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Co-authored-by: Susucre <34709007+Susucre@users.noreply.github.com>
Co-authored-by: Evan Kranzler <theelk801@gmail.com>
Co-authored-by: xenohedron <xenohedron@users.noreply.github.com>
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ssk97 2023-10-09 18:06:19 -07:00 • committed by GitHub
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Mage/src/main/java/mage/abilities/AbilityImpl.java
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@ -442,6 +442,9 @@ public abstract class AbilityImpl implements Ability {
// mandatory additional costs the spell has, such as that of Tormenting Voice. (2018-12-07)
canUseAdditionalCost = true;
break;
case PROTOTYPE:
// Notably, casting a spell as a prototype does not count as paying an alternative cost.
// https://magic.wizards.com/en/news/feature/comprehensive-rules-changes
case NORMAL:
canUseAlternativeCost = true;
canUseAdditionalCost = true;