Invasion of Segovia // Caetus, Sea Tyrant of Segovia

Battle cards ask your creatures to attack toward a payoff, and most Sieges hand you a single game-swinging flip once the defense is worn down. This one behaves differently: the two 1/1 Kraken tokens you make on entry are less a payoff than seed capital, bodies that push toward defeating the Siege and, after the flip, exist to be tapped for value. Because Caetus grants convoke to every noncreature spell you cast, those Krakens and everything else on your board stop being just attackers and become mana. The end-step untap of up to four creatures closes the loop: convoke them to cast a spell, untap them, block or attack, then repeat next turn. A tokens-and-Serpents shell is an unusual home for a spells-matter engine, and the convoke grant reframes what a big-mana deck is doing, letting creature count subsidize a control or spellslinger plan rather than sitting idle as chump blockers. The tension the design resolves is the old one where creatures and noncreature spells compete for the same turns; here the creatures pay for the spells and then get to act anyway. Getting there means committing bodies to bring down a Battle first, and that commitment is what earns the untapping engine on the other side.