Let me try again.
Important point.
There are two kinds of powers.
Card power listed on cards like, spells, allies, weapons, armor, and items.
And
Character Powers, listed on the character sheet.
(For Lini: her ability to change her strength and dexterity die to a d10, or her ability to add d4 to any check)
From the rules:
during a check you can play card powers one of each type of boon, (p11)
and use each character power once each. (P11)
When you play a card, (not a character power) you are revealing, displaying, discarding, burying, or banishing the card. (P10).
So for example:
When Lini Reveals her longsword for a fight this DOES count as playing a weapon since she played a card power on her card. She may not play another weapon.
When Lini Discards her blessing to become a bear this DOES NOT count as playing a blessing because it is a character power on her character sheet. She may play another blessing.
When Lini Reveals her Animal Ally to add the d4 this DOES NOT count as playing an ally because it is a character power on her character sheet. She may play another or even the same ally for its effect.
This is actually something that is not clear in the rules, but has been confirmed by Mike in many posts. I hope you found this helpful. If not I will stop.