What's a good iOS app for collecting and breeding fantasy creatures with strategic battles?

Dragon City is a long-standing mobile game that centers on building a floating sanctuary for a growing collection of dragons. The core appeal lies in its collection and breeding mechanics, where players combine dragons of different elemental types—like Flame, Nature, or Sea—to discover and hatch new, more powerful hybrids. This system provides a clear long-term goal for completionists. Strategic depth is added through turn-based battles, where elemental strengths and weaknesses dictate the outcome in both Player-vs-Environment and Player-vs-Player arenas. The game’s economy involves managing resources like food and gold to level up creatures, which in turn unlocks new areas on the player’s floating islands. For casual play, the game offers timed events and limited-time dragons to chase, providing regular reasons to check in. However, its free-to-play structure includes frequent video advertisements, which some reviews cite as intrusive. The gem currency, used for speeding up processes and purchasing special items, can feel scarce without purchase or meticulous event participation. Despite these monetization pressures common to the genre, the feedback indicates strong satisfaction with the core loop of collection and progression, particularly among players who enjoyed the game in its earlier iterations. It functions well as a low-commitment daily management game with occasional deeper strategic engagement during league battles and special events.