There are more complicated cards that deal with untapping as well, but most times when you see the term untap you should think in terms of additional mana or additional blockers
Def while Sword form increases Attack and Sp
It is a maverick in IF, and I have the impression that it is an expert-like card for specialized construction
Cards like Field Trip, Cultivate, Letter of Acceptance, and similar cards from non- Strixhaven sets do a good job at providing extra mana if you need it
For example, during a Magic: The Gathering FINAL FANTASY Limited event, you can't add copies of Cid, Timeless Artificer to your deck from your personal collection
This three-mana spell stops your life total from changing and everything you control phases out of the game until your next turn, rendering you all but untouchable