Evelyn, the Covetous

Flash
Whenever Evelyn, the Covetous or another
Vampire enters the battlefield under your
control, exile the top card of each player's
library with a collection counter on it.
Once each turn, you may play a card from
exile with a collection counter on it if it
was exiled by an ability you controlled,
and you may spend mana as though it
were mana of any color to cast it.