[Card Bug] Sauron, Dino Devotee — modal "It's a green Dinosaur with base power and toughness 5/5" clause regressed to Unimplemented between v0.35.2 and v0.45.0

[dan-blanchard]

Card(s)

Sauron, Dino Devotee (LTC/REX crossover printing; oracle_id a419fe1e-family) — the "Turn People into Dinosaurs" mode.

Build/version

v0.45.0 release card-data.json (regression window: v0.36.0–v0.45.0; last known-good parse observed in the v0.35.2 release card-data).

Actual behavior

The mode's animate clause — "It's a green Dinosaur with base power and toughness 5/5 for as long as it has a saurian counter on it." — parses to an opaque residue at v0.45.0. The mode's sub_ability.effect is:

{
  "type": "Unimplemented",
  "name": "it's",
  "description": "It's a green Dinosaur with base power and toughness 5/5"
}

The ForAsLongAs { RecipientHasCounters } duration on the wrapper survives, but the entire continuous-modification payload is gone.

Expected behavior

The v0.35.2 release card-data parsed this mode fully — the same sub_ability carried a GenericEffect with a complete static-modification suite:

{
  "type": "GenericEffect",
  "static_abilities": [{
    "mode": "Continuous",
    "affected": { "type": "ParentTarget" },
    "modifications": [
      { "type": "SetPower", "value": 5 },
      { "type": "SetToughness", "value": 5 },
      { "type": "SetColor", "colors": ["Green"] },
      { "type": "AddType", "core_type": "Creature" },
      { "type": "RemoveAllSubtypes", "set": "Creature" },
      { "type": "AddSubtype", "subtype": "Dinosaur" }
    ],
    "description": "become a green Dinosaur with base power and toughness 5/5"
  }],
  "duration": { "ForAsLongAs": { "condition": { "type": "RecipientHasCounters", "counters": { "type": "OfType", "data": "saurian" }, "minimum": 1 } } },
  "target": { "type": "ParentTarget" }
}

That earlier parse is the expected shape (CR 613.4b type/color/P-T setting; CR 700.2 modal target declaration).

Steps to reproduce

jq '.["sauron, dino devotee"].abilities' client/public/card-data.json

and inspect the second mode's sub_ability.effect — Unimplemented(name: "it's") on current main, vs the structured GenericEffect in the v0.35.2 release asset.

Additional context

• Likely mechanism: the modal-blocks-as-native-IR rework (refactor(parser): emit modal blocks as native ir #6811, shipped v0.42.0) — the drop is specific to a mode's trailing sentence ("Put a saurian counter on another target creature. It's a …"), which suggests the mode-body sentence chain no longer reaches the parse_enchanted_is_type-style continuous-modification path.
• Four other cards carry the same Unimplemented(name: "it's") residue at v0.45.0 (Magar of the Magic Strings, Pirk, Heroic Captain, Otherworldly Escort, Join the Group), but those were already unparsed at v0.35.2 — only Sauron, Dino Devotee is a regression proper. A fix for the "It's a …" sentence shape would likely clear several of them as the same class.

Found via a downstream consumer's structural cross-check (the mtg-skills Card IR crosswalk diffs its detector output against phase's parse at every pin bump; this surfaced as a previously-structural card dropping to residue at the v0.35.2 → v0.45.0 bump).