Talk:Purgatory Knights, Scrap-Drill Dragon/@comment-31138435-20180202173809/@comment-26684750-20180202183423

When you use its [Act], you choose and destroy a Purg Knight monster on your field, and destroy it, and if you do, Scrap-Drill gains 1 crit until the end of the turn. Since it does not specify that it can be only used once per turn, you can use it any amount of times per turn. Since it has counter, you can use it at any time during your turn, as long as you follow the "once per chain" rule. The ideal way to play it is to use its ability to destroy your other Purg Knight monsters which have already attacked, and then attack with this while it has increased crit.