Slay the Spire is a strategy adventure single-player card game produced and published by Mega Crit Games, which started releasing on November 14, 2017. Players need to choose a character, using his initial deck to start climbing the tower layer by layer, players need to choose the route forward. Through the battle, events and other ways to obtain randomly selected cards from the character card pool, and trade-offs to build their own deck, use a stronger deck to challenge stronger enemies, and further strengthen their own strength. In the end, you can defeat the third floor of the final boss, and even the final hidden boss. In Slay the Spire, it is mainly about four professions and different cards to keep climbing up the tower and defeating the enemies. Each profession has its own characteristics, and this experience is also based on the path you choose whether to face stronger elite monsters or to face the enemy. 

Here are some methods to open the heart.

Slay the Spire heart opening conditions:

1. You need to collect three kinds of gem pieces.

2. The player then create a role to undertake the task of collecting three kinds of gems and then you will be able to open the heart.

3. The precondition is that players in the game to establish three different careers.

The specific methods：

It requires to pass each for warrior, hunter and robot, with no progression limit. And then you can open the heart. By defeating the elite on the way to get random reinforcement (such as regeneration, plus strength, plus blood, etc.) to get the emerald key. You can collect all three keys to open the fourth major layer to beat the heart.

Introduction of essential fragments:

1. You can find the emerald fragment and elite symbol with flame on top of the map, then enter and defeat the elite (initial with power/continuous regeneration/metalization).

2. You can obtain Ruby shards by recall at the bonfire.

3. You can find Sapphire Shard inside the non-boss treasure chest.