Ability word visible in GUI

Affected Rules:

> 207.2c An ability word appears in italics at the beginning of some abilities. Ability words are similar to keywords in that they tie together cards that have similar functionality, but they have no special rules meaning and no individual entries in the Comprehensive Rules. The ability words are adamant, addendum, alliance, battalion, bloodrush, celebration, channel, chroma, cohort, constellation, converge, council’s dilemma, coven, delirium, descend 4, descend 8, domain, eerie, eminence, enrage, fateful hour, fathomless descent, ferocious, flurry, formidable, grandeur, hellbent, heroic, imprint, inspired, join forces, kinship, landfall, lieutenant, magecraft, metalcraft, morbid, pack tactics, paradox, parley, radiance, raid, rally, renew, revolt, secret council, spell mastery, strive, survival, sweep, tempting offer, threshold, undergrowth, valiant, void, and will of the council.

> 207.2d Similar to ability words, flavor words appear in italics at the beginning of some abilities. Flavor words provide a flavorful description of abilities, but they have no special rules meaning and are not listed in the Comprehensive Rules. While an ability word ties together several abilities with similar functionality, each flavor word is tailored to the specific ability it appears with.

* For 207.2c we could make a List, and if the Trigger or Ability starts with that word (like in `PreCostDesc`) the Word should be rendered italic.
* For Flavor Words, we might need something else like done there: #7657