You can also use ability doublers like Illusionists Bracers to increase your mileage and turn Karlov into a serious removal machine
Gix, Yawgmoth Praetor is clearly based off Edric, Spymaster of Trest: both commanders have basically the same card draw trigger that you build your deck around, and both yield similar playstyles
The other four zones of the board are outside of your Field and serve different purposes: the Rule Zone is where you play rule cards
(1) You can banish 1 Equip Spell you control or from your GY
For example, if your opponent targets your Varis, Silverymoon Ranger with Magic Missile, you can announce the ward trigger and ask if they'd like to pay it
The first deck features cards from Sapphire and Amber inks, while the other has cards from Steel and Amethyst