So, if you have them both in play, Sephiroth can sacrifice Aerith for his fourth trigger, transforming, and then reap the benefits of all the +1/+1 tokens Aerith had built up from his attacking
But that's exactly what happened
Spellweaver Helix works particularly well with Dragon's Approach, as most of your sorceries will just be copies of Approach
Whenever a Land enters the battlefield under your control, you get to add one mana of any color to your mana pool
Each booster pack contains at least one rare card, some uncommon cards, and several common cards
The main thing is that you want to know what the other deck is boarding in against you so that you can counter what they are doing