Speed Warrior is a Common Effect Monster card from Yu-Gi-Oh! (Duelist Pack: Yusei, DP08). Current market price: $0.15.
Common
Duelist Pack: Yusei (DP08)
Card Text
Once per Battle Phase, if this card was Normal Summoned this turn (except during the Damage Step): You can make its ATK become double its original ATK, until the end of the Battle Phase.
