The Top Brands for MTG Card Sleeves Dragon Shield is one of the most respected sleeve makers in the business, and my personal choice for sleeving up my Commander decks - and no, I'm not being paid to say that
Full Arts of this era will use a green linework, continuing the theme of different eras using a single line color for this card type (Gold for XY , Blue in Sun & Moon with Red for Ultra Beasts, and Silver for Sword & Shield )
Ixhel doesn't change when you can cast an exiled card
Normally the tempo battle is all about how to best use your mana within each turn, since whatever you cant spend now is going to waste
A good example is to build what's called a Menger sponge, based on hollow cubes that can be assembled to form even larger cubes with their own gaps in them to keep up the pattern
The Gryff does the same thing