You can discard this card; add 2 Level 4 LIGHT Thunder-Type monsters of the same name with 1600 or less ATK from your Deck to your hand. You can only use the effect of "Thunder Sea Horse" once per turn. You cannot Special Summon during the turn you activate this effect.
After you discarded Thunder Sea Horse to search for Sishunder, you can Normal Summon Sishunder and use its effects to banish Thunder Sea Horse, and Thunder Sea Horse will be added to your hand during the End Phase.
its because of all the batterymen in this pack, discard 1, search for 2 microcells that let u draw/ special summon and such. would be okay as a super but itd win its spot as an ultra with the new thunder dragon cards.