Whenever you gain life, put a +1/+1 counter on Twinblade Paladin.
As long as you have 25 or more life, Twinblade Paladin has double strike. (It deals both first-strike and regular combat damage.)
NM-Mint - $0.70
NM-Mint Non English - $0.70
Lightly Played Non English - $0.60
Lightly Played - $0.60
Moderately Played - $0.60
Moderately Played Non English - $0.60
Heavily Played - $0.50
Heavily Played Non English - $0.50
Damaged - $0.40
Damaged Non English - $0.40