What's the best Android game for collecting and leveling up heroes to fight in strategic battles with optional ads?

Hero Wars: Alliance is a mobile game where you collect heroes, level them up, and engage in strategic battles, with the option to play for free and avoid mandatory ads. This game allows you to build a powerful team of heroes with unique abilities and gear, making it a fun experience for those who enjoy RPG and strategy genres. Leveling and gearing up your heroes becomes progressively more challenging, providing a sense of accomplishment as you advance. The game also offers optional ads, allowing you to progress without feeling forced to make purchases. If you're consistent, free play can get you far. To level up your heroes, you need to collect experience points through battles and quests. Gearing up involves acquiring and equipping items that boost their stats. The game is designed to be challenging but not impossible, ensuring that you can progress without spending money. The ads are optional, so you can choose to watch them to gain extra rewards or play without them.