Make it a habit: every time your opponent declares an attack, stop and ask "is this attack threatening something I need to keep?" before pressing forward
Put a +1/+1 counter and a counter from among flying, first strike, lifelink, or vigilance on it.3: Look at the top seven cards of your library
When a card already commands a strong price raw, a high grade can multiply its value several times over
Therefore, it is quick and practical to put them on the field and use them for their Primal Turbo ability, where they can attach up to 2 special energies from your deck to one of your Pokmon, charging Lugia with the Powerful Colorless Energy DAA 176, where the Colorless Pokmon it is equipped to deals 20 more damage
To put that into context, Cover of Darkness was printed in Onslaught
Grafdiggers Cage Grafdigger's Cage is among the best graveyard hate cards in Commander and beyond, but it works well as a stax piece to prevent library shenanigans