At the time of writing, these are the only two events where these promos are available, but some Final Fantasy TCG events may also offer the cards at some time in the future
It seems like the kind of legendary effect you just play one or two of but one copy is all you need to threaten the dream curve of turn three Urza, turn four The Mightstone and Weakstone, turn five meld
My casual people know what's up
Well, if you answered that its price collapses youd be right most of the time
Optimize Mana and Ramp You need plenty of mana to keep casting spells and to create tokens consistently
This is my Family is a great card, but the deck needs more 2-ink characters to make use of it, and for a smoother curve (always having a character to play for the ink you have)