Whenever Ayara's Oathsworn deals combat damage to a player, if it has fewer than four +1/+1 counters on it, put a +1/+1 counter on it. Then if it has exactly four +1/+1 counters on it, search your library for a card, put it into your hand, then shuffle.
NM-Mint Foil - $1.00
Lightly Played Foil - $0.90
Moderately Played Foil - $0.80
Heavily Played Foil - $0.70
Damaged Foil - $0.50
NM-Mint Foil Non English - $1.00
Lightly Played Foil Non English - $0.90
Moderately Played Foil Non English - $0.80
Heavily Played Foil Non English - $0.70
Damaged Foil Non English - $0.50