The Amonkhet lag lands or bicycling lands are just OK (bi=two, cycling because they cycle, sigh)
Most land destruction cards tend to be attached to sorceries, making Strip Mine unique in that it's a land card
For some reason they were common, despite being fairly powerful, and definitely wouldnt be today due to the amount of text and extreme rules baggage of Protection
Splitting Slime You can look at Splitting Slime as a mana sink of sorts
2 Phyrexian Fleshgorger If youve ever wanted to put a massive amount of pressure on your opponent just try casing a full-sized Phyrexian Fleshgorger
Most modal spells have some form of removal, card draw, card selection, or token generation attached to them, and you'll find that you often have something you do in any given situation