Then he saw his Guildmage copying spells. Copying triggers.

Turn 5: He cast Guide’s Echo targeting the Frost Lynx still on board. He created a 1/1 copy of the Lynx—a tiny, scampering illusion. He swung with the original Lynx (still unblockable from last turn), dealt 2, and chose not to sacrifice it. Then he swung with the token copy. It dealt 1 damage, and he sacrificed it —giving unblockable to the real Lynx again for next turn.

For years, the great Izzet League tried to solve the problem of the unblockable. They built Aether Tunnel (enchantment: unblockable), Rogue’s Passage (land: pay four mana, make unblockable), and even the legendary Whispersilk Cloak (equipment: shroud + unblockable). But these were static solutions—brute-force magic that announced itself.