So, for a total of six mana, you can make Zack a respectable 4/6 with the Buster Sword equipped
If youre able to keep The Aetherspark attached and get some decent hits in, you can keep drawing cards or pop the -10 ability to get ten mana of one color
Temur Battlecrier Temur Battlecrier is a solid 3-mana creatures that makes your spells at least 1 mana cheaper, without any specialization (e.g., artifacts or noncreatures)
You should basically always point this at yourself, since it enables Escape perfectly (if the game has gone super long, this is probably unable to connect, but you could mill your opponent out if hes wearing Wings of Hubris)
These would be better with haste, and my rankings are in this order: green, black, white, blue, and red
This includes shocklands, triomes, tango lands, or any other land that has these basic land types, so mana fixing becomes trivial very quickly