I personally love switching up my card sleeves from one deck to the next
I won't call it the best MTGO or MTGA tracker since it doesn't automatically update
Example: Diseased Vermin reads, in part, "At the beginning of your upkeep, Diseased Vermin deals X damage to target opponent previously dealt damage by it, where X is the number of infection counters on it." If Diseased Vermin phases out, it "remembers" how many counters it has and also which opponents it has previously damaged
Soft fabric top to protect your cards and reduce damage
The more draw engines you have, the more consistently you'll chain enchantments together and keep your hand stocked
Niko Aris In introducing Niko Aris, the Magic story team hinted that this new planeswalker would feature a more aggressive take on blue