Steranka says theres a limited-edition Pokmon GO Fest T-shirt released each year that would make a great gift
They can also turn the tables against foes who they should not normally be able to stand up to with specific move effects that target a particular card type
The idea here is you're melting down (or whatever action is equivalent for a magical sphere) an artifact and reforming it into a brand-new one, paying the 'difference in power' with mana
Alliances was a pretty revolutionary set, and Thawing Glaciers was an important part of that revolution
Sure, in the type of decks that want him, Urza probably will want to let that ultimate rip pretty often if you can, but he provides so much long term value that keeping him at high loyalty and just grinding out card advantage with him seems great in some games
Thats why you should never leave home without a Scavenger Grounds in your back pocket, kid