It's 5 mana, which is even more expensive than an already expensive 4 cost enchantment with several variants, but it's a 4/4 on it's own, drops a +1/+1 somewhere (probably on itself by default) and then will give you draw
Theres even a location card, Tropical Rainforest, that forces opposing damaged characters to challenge if able
If you use Called by on a card, dont forget to account for the negation on your turn
If it swings, (or taps for mana) it can be targeted, so I wish they had just done a full on hexproof like the Caryatid
The Base Set Charizard, which is considered by many to be the Holy Grail of Pokmon cards, illustrates the challenge of finding a first edition card with a high grade
Lastly, if you have highly-valuable cards in your Commander decks and Cubes, I recommend double-sleeving