The Grass-type starters are regularly known to be a top pick for many, although that is an argument that is often brought up for debate by players and collectors alike
To move a counter from one permanent to another, the counter is removed from the first permanent and put on the second
Cursed Scroll is a means of doing continuous damage to players and/or killing creatures at no card cost
Each deck costs $75 (separate from the Collector's Edition decks), but if you opt in to buying the 4-deck bundle, you'll essentially get one of them for free
The only issue I see with this build is that you are sacrificing consistency (e.g., running Aurora energies instead of Speed energy) in order to have different attackers, so I will really recommend you to test it out first and see how it adapts to your own style of playing
However most of the cards after the Lord of the Ring s main set release are not on MTGA