A Covenant may be used either as an artifact or as an enhancement. Both a grail and a Bible picture together in the icon box show the card is a Covenant. When you play a Covenant, you decide how to use it. If you want to use it as an artifact, disregard the Bible picture and play the card as you would any other artifact. If you want to use it as an enhancement, disregard the grail picture and play the card as you would any other enhancement. Selective text of covenant cards (such as “may be used twice”) is only applicable when used as an artifact.
NOTE: The same Covenant may not be used as both card types in the same game unless the card is returned to face value after having gone to your draw pile or discard pile.