As a dedicated "Summon"-centric legend, Yuna seems like fertile ground for open potential in deckbuilding
This made it a far more important card than its numbers would indicate because it made an entire deck exist for a long time, and in some cases Aluren was the only viable combo strategy available and taking it away would have radically altered the balance
If Kalamax becomes tapped as a cost to cast your first instant spell in a turn, its first ability triggers
See you next week for another bout of this stuff, since it's pretty deep.
Anytime she attacks an opponent, you get to put either an Angle, Demon, or Dragon creature from your hand into play, tapped and attacking that same opponent
A sneakier way is to equip Champions Helm to Zack Fair