Malleable Incubator

Impending 7 - {1}{u}{u}
Whenever a creature dies, exile it face-up and choose a keyword that creature has. Put a
+1/+1 counter and a counter of that kind on Malleable Incubator.

When the last time counter is removed from Malleable Incubator, sacrifice it and create a
0/0 Horror creature with all creature types of cards exiled with Malleable Incubator, and
move all of the counters from Malleable Incubator onto that token.