Ultra Clash

Ultra Clash (超・激突 ; Chou Gekitotsu) is a keyword introduced in BS58. The keyword is worded as follows:
*Ultra Clash (When Attacks)Opposing Spirits/Ultimates must block if possible. This effect can't be prevented by opposing effects.
Ultra Clash is an upgrade of True-Clash, which itself was an upgrade of Clash. The significance of Ultra Clash is that it can't be prevented by opposing effects, covering the main weakness which the other two older keywords have.
While introduced as one of the main gimmicks of the new generation Red-Green Rush deck during True-Rebirth era, cards with the keyword aren't really used at the end as it turns out to be more straightforward to use the cards that gain resources and directly remove opposing Spirits/Ultimates on attack. The relatively low BP of the cards with Ultra Clash also contributed to the issue. 
On the collaboration side, however, Ultra Clash becomes the main gimmick of Kamen Rider Drive's deck introduced in the Contract Era. Different from the Red-Green deck in True-Rebirth era, the keyword becomes the literal core of the deck, and comes with more supports that generates value and synergizes well with the keyword, including Bursts that immediately opens when Spirits are blocked, cards with life burn effects when own Spirits with Ultra Clash are blocked, draws and increase of BP, Grand Skill that refreshes the opposing Spirit in Flash to make the best use of the ability etc. While first introduced as a main set keyword, it becomes a complete deck via collaboration. 
== Related Articles ==
* List of cards with Ultra Clash
* List of cards supporting Ultra Clash
* Clash
* True-Clash
* Clash X
Category:2nd tier effects