End Crystal explosion particle travel direction change for Crystal PvP

End Crystals don't do that much damage below their level (when above obsidian/bedrock), so make it so that explosion particles go in all directions, but not below (unless if there are no Obsidian/Bedrock underneath it).

This is to give new PvPers a clue that Crystals don't do a lot of damage below, which will attract more newcomers and will slightly lower the learning curve for Crystal PvP.

When fighting the Ender Dragon, players will start noticing that when they detonate the Crystals, they will wonder why the particles don't go below the Crystals. This will make people curious and start looking for answers online, which in turn will attract even more Crystal PvPers.