pokemon cards booster box darkness ablaze Pokémon Ablaze: Grimmsnarl VMAX Pokemon Sword & Shield Darkness

The other two cards you'll definitely want to pull aside for the trade binder are Boltwave and Swiftfoot Boots

This makes the card with the Blocker ability the target of the attack, rather than the one that the attacker declared

Self-mill has a lot of options

The aura Favorable Destiny is dirt cheap, and provides her with Shroud as long as you control another creature, while the shroud-granting equipment Lightning Greaves and Whispersilk Cloak are more expensive but very useful for any Voltron commander

Beyond that there is how immediate the life gain is, how much you get or can potentially get, how cheap the card or effect is and how hard it is to disrupt