The Sapseep land is a Forest that taps for mana and if you control two or more Green cards, you can tap and gain a life, which is great reliable life flow over time
When you flip this up during Planeswalking, each player does whatever the card says, in turn order
The Most Expensive Standard Since Caw Blade There's been a lot of discussion lately about the price of Battle for Zendikar Standard, and the general feeling of the community is that it's astronomically high
Credit: Wizards of the Coast Akul the Unrepentant Marcy: Rakdos kind of fell off in Standard after some bans, and I'm not exactly sure this is the card to put it back on top, but this could be an interesting or weird way to cheat out extremely expensive creatures if you have cheap tokens or low-cost creatures like Voldaren Epicure and such on the field
These decks usually bump up to 26-28 lands and back their mana base up with cantrips and card draw to ensure they always hit land drops
Abandoned Air Temple is worth considering in any creature-focused deck with a focus on the color white