Chroma ei ole keyword vaan ainoastaan "abilily word". Ability word ei sääntöjen näkökulmasta tarkoita mitään, se vain kytkee toisiinsa kortteja, joilla on samankaltainen toiminnallisuus.
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 battalion, bloodrush, channel, chroma, domain, fateful hour, grandeur, hellbent, imprint, join forces, kinship, landfall, metalcraft, morbid, radiance, sweep, and threshold.
Devotion sen sijaan on yksikäsitteisesti määritelty sääntötermi, kuten "attacking creature" tai "dies". Sekään ei siis ole keyword, eli kortilla ei voi olla "devotion" -nimistä abilitya samaan tapaan kuin esimerkiksi "trample" tai "flash".
700.5. A players devotion to [color] is equal to the number of mana symbols of that color among the mana costs of permanents that player controls.