The most famous example of an undead boss that can be defeated this way is Gi Nattak from Final Fantasy VII
Then in your combat you can flip her into an Anthem to double pump your legendary team, but only if you control two more
Auron, Venerated Guardian* From Final Fantasy X Counter Blitz Commander Deck, Auron isnt the best removal but he is a consistent attacker who works with the decks synergies and takes out problematic creatures
Creatures (7) Lands (21) Spells (32) Creatures (8) Lands (20) Spells (32) Esper Pixie picked up Cecil, Dark Knight and Starting Town
Pulled from the one foil slot in each booster pack (which can be any rarity from Common through Enchanted)
Being able to pay one cost less for all characters if you just have a Simba, for example, present is an ability that will make players look at this card twice