Theres an interesting cycle of modal double-faced cards (MDFCs) that let you cast both sides, but if you cast the front side, you can transform them later for the cost of the back side
If you at all care about lifegain (or youre just running Shadowspear and Loxodon Warhammer), then this can be a reliable way to take out another opponent after dispatching one
I would recommend starting with somewhere between 36-38 lands in all your decks, then adjust from there as you need to
Example of Playability: Demonic Tutor is an uncommon, but its immense power in the popular Commander format makes it far more valuable than thousands of bulk rare cards
If its in the Active Spot, Legendary Pulse draws you a card at the end of each turn
Parley is what's known as an ability word: While all parley cards share a similar theme, each one has a specific effect that you need to check card by card