Indestructible
As long as your devotion to blue is less than five, Thassa isn't a creature. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)
At the beginning of your upkeep, scry 1.
{1}{U}: Target creature you control can't be blocked this turn.
Near Mint - $3.20
Near Mint Non-English - $3.20
Lightly Played - $2.80
Lightly Played Non-English - $2.80
Played - $2.20
Played Non-English - $2.20
Heavily Played - $1.90
Heavily Played Non-English - $1.90
Damaged - $1.60
Damaged Non-English - $1.60
Foil Prices
Near Mint Foil - $16.70
Near Mint Foil Non-English - $16.70
Lightly Played Foil - $15.10
Lightly Played Foil Non-English - $15.10
Played Foil - $11.70
Played Foil Non-English - $11.70
Heavily Played Foil - $10.10
Heavily Played Foil Non-English - $10.10
Damaged Foil - $8.40
Damaged Foil Non-English - $8.40