If you're looking for manga similar to Dragon Crisis!, you might like these titles.
Born and abandoned in the mountains, Hadar, picked up by an ancient dragon. With inherent powerful magical abilities, he is raised by the ancient dragon and, without realizing, becomes the "strongest being" capable of advanced magic at the age of 12. Hadar is sent to the most challenging magic academy by the ancient dragon to adapt to human society. However, he effortlessly dominates school life with his magical prowess!!
Two decades ago, the dragons returned to earth. Soaring above the skies leaving behind trails of destruction. They attack humans for the simple reason, their destructive impulses. In order to fight the dragons, humanity acted. They began to dabble in magic...
When humanity was threatened 5 years ago, the boy who saved the world was driven to despair and became regarded as the enemy of all of mankind. And now a new crisis approaches humanity. The curtain rises on a gallant drama about a hero falsely charged.
Working under a certain feudal lord, Haru is very ordinary and lives a normal life. However, the jewel in the ring her late mother had left her can only be found in the dragon country - it’s an extremely rare thing. After finding that out, her life completely changes. She picked up a baby dragon, and a mysterious man wearing black clothes appeared after. What will happen to Haru’s ordinary life?!
Set in a world where innumerable dragons appeared and ruled the skies before humanity had the chance to be able to fly, Hitoe Kakujou, a first-rate witch flies through the skies freely on her broom.
On Pomello Island, a wayward genius named Enji has finally decoded the Encyclopedia of Summoning and with it the knowledge to summon and control the dreaded Yellow Dragon. The power of the Yellow Dragon is to command all the animals of the world; and with it Enji plans to at last gain fame, respect, and the affections of his beloved Moegi-san. The conditions are right, the huge egg opens, and out walks... a little girl? Enji's plans for world domination and winning the love of Moegi-san just fell apart. Or have they...
Ten years after a cataclysm destroyed the planet, magic prodigy Lag Logline is entrusted with the title of "sage" and the task of preventing the world's destruction one thousand years from now. However when he awakens from his time freezing spell the world he finds is nothing like he remembers. Upon meeting a swordswoman named Clau, Lag finds out that this world one thousand years in the future doesn't know what magic is. After having his own magic mistaken for swordsmanship, Lag enrolls in the Imperial Sword Academy in order to unravel the mysteries of the world around him and fulfill his promise to save humanity.