Current Version can be found here.
Termination went through some changes, but all of them were changes to the cost. It's effect has always been to kill a single monster of your choice that's under the effect of KR.
It started out with 6G, but was reduced to 4G in Beta 2.0 and to 3G in Beta 4.2. Beta 4.3 changed the decription of the card from 'poisoned monster' to 'monster under KR', which didn't change the effect.
Beta 5.7 raised the cost back up to 4G, but was reduced back to 3G in Beta 6.0, only to be raised to 4G yet again in Beta 7.1. This mostly had to do with the changes to the effects of KR and the Class.
SOUL Type: Perseverance
- 6 (Pre Beta 2.0)
- 4 (Post Beta 2.0)
- 3 (Post Beta 4.2)
- 4 (Post Beta 5.7)
- 3 (Post Beta 6.0)
- 4 (Post Beta 7.1, Current)
Effect: Kill a monster under KR.
Rarity: Blue (Rare)