one piece card game royal blood op 10 Game: New and Existing Cards Can Be Combined to Build Powerful Decks Display One Piece Card Game

Most of the competitive decks that play counterspells play them as part of a general suite

Thunderbreak Regent Thundermane Dragon Thundermaw Hellkite Tiamat Tiamat's Fanatics Twinflame Tyrant Two-Headed Dragon Two-Headed Hellkite Tyrant of Kher Ridges Tyrant of Valakut Tyrant's Familiar Ureni of the Unwritten Ureni, the Song Unending Utvara Hellkite Vaevictis Asmadi Vaevictis Asmadi, the Dire Vampiric Dragon Velomachus Lorehold Velukan Dragon Vengeful Ancestor Verix Bladewing Viashivan Dragon Volcanic Dragon Voracious Dragon Vrondiss, Rage of Ancients Warmonger Hellkite Wasitora, Nekoru Queen Worldgorger Dragon Wrathful Red Dragon Young Red Dragon Ziatora, the Incinerator Zodiac Dragon Zurgo and Ojutai

The upkeep cost of just one blue mana is trivial to pay

If both targets become illegal, Wicked Slumber won't resolve at all