If you have more than one of Zariel's emblem, the abilities will each trigger at the end of the first combat phase on your turn
If it's a permanent card, they put it onto the battlefield
Additionally, many players werent as careful when sliding them through the e-Reader, which further reduces the number of mint and near-mint examples of these cards
If this card is destroyed by battle, or if this card in its owner's possession is destroyed by an opponent's card effect: You can add 1 "Mathmech" card from your Deck to your hand
Obviously, the Golgari have just embraced this and run with it, but it does mean that black-green tends to have a narrower band of things it can do than many of the other two-color combinations
It can be a big beater or a two-mana value piece