RIVAL SCHOOLS Key decisions like which prowess creatures to run, and what sort of effects you consider priorities, should reflect how you plan on using prowess to actually win the game
Snowfield Sinkhole Snowfield Sinkhole is just the snow version of Forsaken Sanctuary, but that small difference can mean a lot in decks that require snow mana or snow permanents to get additional benefits or cast spells
Improvisation Capstone Read Improvisation Capstone closely and you'll see that it results in at least one free spell, and the catch is you get at least four mana's worth in case you exile Lightning Bolt, Curse of Opulence, and Underworld Breach, you could cast each of them
Magecraft even gives you a pest for the copy itself, so you end up making a profit of one token
Ixalan block has brought a lot of things for tribal decks, mostly vampires and merfolk as pirates and dinosaurs were not a thing prior to the block