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Heat is just faking it as a distraction, and tells Serph to play along he's still loyal, though if you fail to trust Heat and do fight back seriously, then it can come back to bite you in the sequel

Izzet Lutri | IKO Standard | Abe Sargent Companion (1) 1 Lutri, the Spellchaser Creatures (10) 1 Bonecrusher Giant 1 Brazen Borrower 1 Crackling Drake 1 Fae of Wishes 1 God-Eternal Kefnet 1 Niv-Mizzet, Parun 1 Pteramander 1 Rielle, the Everwise 1 Sprite Dragon 1 Voracious Greatshark Planeswalkers (3) 1 Chandra, Acolyte of Flame 1 Chandra, Awakened Inferno 1 Ral, Storm Conduit Instants (14) 1 Anticipate 1 Chemister's Insight 1 Expansion // Explosion 1 Fire Prophecy 1 Flame Spill 1 Ionize 1 Negate 1 Neutralize 1 Opt 1 Scorching Dragonfire 1 Shock 1 Sinister Sabotage 1 Tale's End 1 Thassa's Intervention Sorceries (5) 1 Bond of Insight 1 Callous Dismissal 1 Invade the City 1 Light Up the Stage 1 Purphoros's Intervention Enchantments (2) 1 Omen of the Forge 1 Omen of the Sea Lands (26) 9 Island 9 Mountain 4 Evolving Wilds 4 Temple of Epiphany That's just one quick example of a way to build a Standard deck with one of the worst in the cycle in Standard

Since Kaiba's deck doesnt need to tribute to summon monsters of this level and power, there are better options than this card
Creatures (12) Lands (21) Spells (27) In Urza Block Constructed, Tinker had already proven itself busted, finding Phyrexian Colossus, Mishras Helix, Phyrexian Processor, and more
These cards let you easily XYZ into Bahamut Shark to ensure the rest of your play goes smoothly