One of the best parts of Ludevic, Necro-Alchemists ability is that it doesnt specify combat damage, so spellslinger commanders, burn decks, or life drain decks have just as much chance of getting extra cards with this partner in play as more combat-heavy builds
Theyre also incentivized to go deep on group hug effects that benefit all players even if they do help the bad guy, youre usually still getting 300% of the value they are
Gardevoir can do this thanks to its Psy Shadow ability, which lets you take a Psychic Energy from your Energy Zone and attach it to the Psychic Pokemon in your Active Spot
Abilities affect the game play of Magic the Gathering by changing the basic functions of many cards
Its certainly the boogeyman on this list, and you cant blame it
By paying a Black mana and one life, you can make a creature -1/-1