Contamination (Original - Beta 5.2)

Original - Beta 5.2

Its current version can be seen here.

5.3 Contamination

Post Beta 5.3

Originally, Contamination would give KR to all monsters in the opponent's hand. Now, the way KR worked changed from time to time. Up to Beta 5.0, it would deal 1 damage at the start of the owner's turn if they are on the board, able to kill them and after Beta 2.9, blocking healing.
Contamination (Beta 6.2)

Post Beta 6.2

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.

Contamination 8.0 ish

Post Beta 6.8

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 not only can't be removed by returning the monster to a player's hand, but also damages monsters in hand, but couldn't kill a monster no matter where they were, 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 2.9 version of able to kill, but unable to work in hand and 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. Beta 18.1 buffed the effect by expanding it to killing all monsters under KR, not just enemy monster, while also making it add a random Perseverance spell with -1 cost to the user's hand for each kill. Beta 19.0 nerfed it a bit by making it no longer able to give another Contamination.

Contamination (Beta 18.1)

Post Beta 18.1

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 monsters in the enemy's hand. (Pre Beta 6.8)
  • Kill all enemy monsters under KR. (Post Beta 6.8)
  • Kill all monsters under KR. For each kill, add a random PV spell with -1 cost to your hand. (Post Beta 18.1)
  • Kill all monsters under KR. For each kill, add a random other PV spell with -1 cost to your hand. (Post Beta 19.0, Current)

Rarity: Purple (Epic)