[fixed/closed]Chainer, Dementia Master: color/subtypes/ltb

[Korath]

Describe the Bug:
Chainer, Dementia Master turns the creatures it reanimates into Nightmares, without keeping their old creature types or changing their colors.

In this screenshot, the summoning-sick Serra Angel was cast normally; the one on the left was reanimated by Chainer.

Also, if Chainer, Dementia Master is itself a nightmare (Wings of Velis Vel is a handy test) when its leaves-the-battlefield trigger runs, it'll affect itself. This has variously strange effects depending on how it's leaving the bf; if it's being bounced, for example, you end up with a copy in your hand and another in exile.

Which card did behave improperly ?
Chainer, Dementia Master.

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
Dev, shortly past EMN.

What exactly should be the correct behavior/interaction ?
The Serra Angel on the left should be black and should be an angel nightmare. It should therefore be 3/3: 4/4 base, +1/+1 for Chainer's bonus to all Nightmares, -2/-2 for the two Engineered Plague's. In particular, it shouldn't be white and black, which is the bug I expected to see - the other cards adding subtypes and fiddling with colors like this say their targets keep their old colors and creature types, while this sneakily just says creature types.

The leaves-the-battlefield trigger technically shouldn't resolve until Chainer is already off the battlefield, the same way graveyard-from-the-battlefield triggers don't, but it happens too early in Manalink. This makes it simpler to program (no temporary orange effect cards), but you end up with bad edge cases like this.

Are any other cards possibly affected by this bug ?
Probably not affected, but the other reanimate-a-creature-and-change-its-colors-and-subtypes cards in the batch I'm currently working are Rise from the Grave, Grimoire of the Dead, Ever After, and Soul Separator. None of them are quite the same, though, and only the last replaces colors instead of adding them.

[Gargaroz]

All fixed in 423b37a