At the beginning of each of your main phases, if you haven't added mana with this ability this turn, you may add X mana of any one color, where X is the number of Islands target opponent controls.
NM-Mint - $5.40
Lightly Played - $4.90
Moderately Played - $4.40
Heavily Played - $3.80
Damaged - $2.70
NM-Mint Non English - $5.40
Lightly Played Non English - $4.90
Moderately Played Non English - $4.40
Heavily Played Non English - $3.80
Damaged Non English - $2.70