Clash X (激突X ; Gekitotsu ten) is a keyword introduced in BS50, exclusive to The StarEmperorDragon Meteorwurm X. The effect is worded as follows:
- Clash X - All your Spirits gain the following effect: (When Attacks) Opposing Spirits/Ultimates must block, if possible. When a blocking Spirit/Ultimate is destroyed/depleted, send an opposing Life to the Trash.
Clash X is an upgraded version of Clash which adds elements from True-Consecutive Blade (life reduction if the blocking Spirit is destroyed/depleted) and The HorseTwelveGodKing Execeed's effect, which spreads the keyword across your field, being an upgrade of them in versatility, but a downgrade in damage dealt.
The "X" stands for the Roman numeral 10, as the Battle Spirits TCG celebrates its 10th anniversary.