one piece tcg ultra deck the three captains st 10 TCG: Its powerful build can quickly produce results in competitive matches ULTRA DECK -The Three Captains-

720.2a If an effect refers to a card, spell, or permanent that has an Omen, it refers to an object that has the alternative characteristics of an Omen spell, even if the object currently doesnt use them

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Keep in mind that you dont have to just attack with Dragons to trigger its Pack Tactics ability

Menace (This creature can't be blocked except by two or more creatures.) Time Compression When this creature transforms into Ultimecia, Omnipotent, take an extra turn after this one.

There are a lot of themed decks that use this card and most especially in Commander, so much so that you'd be crazy not to include this card in your deck