An independent deck would be a deck where the cards in the deck are powerful in their own right
This helps protect some of your more potent permanents, like Ghirapur Orrery, or return saga cards like Elspeth Conquers Death for more value
I block it with [c]Venomous Hierophant[/c], which is a 3/3 deathtouch creature
See rule 701.48, Learn. 701.48a: Learn means You may discard a card
The cheapest battles, of which there are nine, touch all five Magic colors either by themselves or as part of a color pair
You can likely guess what fairy tale trope its referencing from the title, but to reinforce the hint it uses a new mechanic, bargain, which gives you a bonus effect if you sacrifice an artefact, token or enchantment