Saber Shark [DUSA-EN004] Ultra Rare

Cannot be used as a Synchro Material. Up to twice per turn: You can target 1 Fish-Type monster on the field, then activate 1 of these effects.
- Increase its Level by 1.
- Reduce its Level by 1.
You cannot Special Summon any monsters during the turn you activate this effect, except WATER monsters.