To read about other apps graphical user interfaces that I designed, see ScoreOS or Winter Warland .
Keep the pressure going and remove their ramping creatures (Drover of the Mighty, Naga Vitalist, Channeler Initiate, Otepec Huntmaster)
To find the current market price of a Pokemon card, your best bet is to go to ebay and search sold listings (not "for sale" listings): Go to ebay
Normally, this system works pretty well because if you look at random Standard or Modern cards, there are generally hundreds of listings on TCGplayer , giving us a large and meaningful sample size and a pretty stable representation of a card's price
More Price Spikes: MTG Future Sight Frame Cards See 400% Price Increase
What Essence Sliver does is separate the two instances of combat damage and then the life gain