From the Start, I Signed In to the Mad Fishing Emperor System

[The hottest emperor fantasy novel of 2021] The protagonist transmigrates to another world and becomes an emperor from the start, gaining the Sign-In Fishing Frenzy Emperor System. In an instant, he has it all: sign-ins at his fingertips, fishing at his command! In this world where the strong rule, other prodigies are overjoyed just to obtain a divine-grade martial soul. But every time our protagonist advances to a new major realm, he can sign in to receive a supreme martial soul even more powerful than a divine-grade one! Azure Dragons, Black Tigers, Vermilion Birds, Black Tortoises, Qiongqi, and Qilin all dwell within our protagonist! Other people get one. Our protagonist has more than he can count! And as for powerful sacred bodies, divine bodies, divine beasts, and holy beasts, he keeps getting those as rewards for leveling up and signing in, too. Other emperors fret over finding powerful generals. Our protagonist can casually sign in for a Hero's Chest and capture a Martial Saint like Guan Yu or a God of Killing like Bai Qi... Other emperors can wait decades for a blessing in the form of a celestial omen. But omens appear in the Great Xia Dynasty every three days on a small scale and every five days on a grand one, leaving the other emperors green with envy and practically driven to despair. Other people are thrilled to break through by a single cultivation rank. But our protagonist can advance more than ten levels in half a day! As for other professions, like alchemy, crafting, and array-making... whatever our protagonist tries brings forth an omen and earns the reverence of the masses! Most unbelievably, even a famous quote from our protagonist becomes a holy utterance, summoning radiant clouds from all directions for the world to read and admire. After signing in, he can even obtain the power of omens and crush his opponents... The protagonist's biggest headache is that he wants to keep a low profile and develop in secret, but the System won't let him. It insists he dominate the world!