Its current version can be seen here.
Originally, Contamination would give KR to all monsters in the opponent's hand. Now, the way KR worked changed from time to time. At first, it dealt 1 damage each turn, blocked healing, would not be removed if a card was returned to the owner's hand, but would not take damage while in the hand.
With these rules for KR, Contamination gained buff after buff, dropping its price each time due to the more guess work it gave unlike Pollutant Gas, which at that time gave KR to all monsters on the field.
It started out at 8G, dropped to 7G in Alpha 3.2, dropped to 5G in Beta 2.0, and finally, dropped to 4G in Beta 4.2.
Beta 5.0 reworked KR so that it now also damages monsters in hand, but couldn't kill a monster, leaving it at 1 HP (but kept the KR, able to be killed by Termination). This made Contamination much more useful. It could result in a lot of late-game monsters entering the field with only 1 HP. Because of this, its Cost was increased to 7G. But because it was still guessing work, its cost was reduced to 5G in Beta 5.3, and further reduced to 3G in Beta 6.2.
With the Class and KR rework of Beta 6.8, giving it back the Pre Beta 5.0 version of able to kill, but unable to work in hand (and now also no longer denying healing), Contamination got a much needed rework. Now, with Pollutant Gas working as a Worsening for all enemies, Contamination now works as a Termination for all enemies, killing every enemy monster under KR. Because of this, its Cost was increased again, this time to 8G, bringing it back to the very first price.
Soul Type: Perseverance
- 8 (Pre Alpha 3.2)
- 7 (Post Alpha 3.2)
- 5 (Post Beta 2.0)
- 4 (Post Beta 4.2)
- 7 (Post Beta 5.0)
- 5 (Post Beta 5.3)
- 3 (Post Beta 6.2)
- 8 (Post Beta 6.8, Current)
- Give KR to all enemy monsters in the enemy's hand. (Pre Beta 6.8)
- Kill all monsters under KR. (Post Beta 6.8, Current)
Rarity: Purple (Epic)