Nasty trio of Charm options, and one of the key things to add to multiplayer decks is utility and with three options, all of which are strong, this is heavily worth the spot in your 100 size Commander deck
Gary Baseman's created art for each of the basic MTG lands, so if you care about value you'll skip this lair, but if you care about whimsical creepy-cute characters you're in luck
It is also a great pull for fans of the Pokemon Legends: Arceus game, where Giratina is one of the primary Legendary Pokemon
Lullmage Mentor gives you merfolk tokens with your counters, with potential to counter lots of spells
If you somehow control multiple copies of Caradora, they would each increase the number of +1/+1 counters put on a creature or Vehicle you control by one
This does stop you from targeting cards in your graveyard, but there are workarounds