dimensions of an mtg card Playing Dimensions: Sizes, Types & Design Guide what size are mtg cards

As for the ability to sacrifice it for an Eldrazi meh

You'll also get to make use of any enter-the-battlefield or death triggers those creatures feature (note, as Deadpool's ability is a replacement effect not a triggered ability, Deadpool enters with the text box he's stealing, so can copy ETBs)

The Final Fantasy Commander decks are beginner-friendly but expensive, running anywhere from $80 to $130 when Commander decks in other sets are much cheaper

Being able to regenerate multiple life per turn would indeed create a fortress-like persona before one's opponent

While Land Tax isn't what traditionally what you'd think of as a ramp spell, it at least ensures that you will be able to have land drops and thin out your deck for the foreseeable future