Summary Cards from Pioneer Masters are best suited for Historic formats, not Standard, with strong options for Brawl and Explorer
Does Descend Use the Stack
The number in the case of Earthbend, signifies how mana +1+1 counters will be put on a chosen land, which also becomes a creature with haste
If you do, draw X cards, then you may put a permanent card with mana value X or less from your hand onto the battlefield, where X is the sacrificed creature's mana value
Kethek, Crucible Goliath Reverse Birthing Pod is a lot of fun, and you dont need to build a deck around this card to still include it
Going back a ways for this colorless draw card, it's land from the Cephalid Coliseum Odyssey expansion of Magic: The Gathering