Its a great way to steal high-impact cards like Ragavan, Nimble Pilferer, Sol Ring, or random tokens
TCGplayer also has a mobile app that makes uploading a collection easier, though its probably not the best for inventorying large amounts of bulk, since you need to individually scan cards
Klauth may be expensive for its stats, but this Gruul Dragon will provide some serious ROI before long if it has a decent board state backing it up
They were discontinued after Vivid Voltage in 2020 and typically add value to a Pokemon card
While you will generally want to cast combat-oriented sorceries or enchantments during your first main phase (like Blanchwood Armor), for the most part you will want to wait to cast other spells and creatures until after combat occurs
On the other hand, a deck that's content to drag things out until turn ten or twelve can be patient and wait for the right tools to show themselves