lotr mtg signed art cards Generous Ent Art Card} (Signed) | Art Series: The Lord of the Rings Gollum, Patient Plotter Art Card

This card is a great value engine without being broken

Some effects state that an artifact doesn't untap during its controller's untap step

Also, its not legendary so it works well in multiples, since both the lifegain triggers and the +2/+2 bonus stack

Previously Banned/Restricted Cards in Common Formats I'm not aware of any official list specifically composed for this purpose, but there are other sources that more or less specific for this purpose will help with the search: Scryfall (a third-party card search engine) added a custom search tag for Spike-tutorable cards

And Black is the color of mass X spell discards like Mind Twist