Normally, the big problem is that any kill spell can stop matters
With only five tickets total, expect serious bidding wars
Whenever you cast a noncreature spell with mana value 3 or greater, Y'shtola deals 2 damage to each opponent and you gain 2 life
Dragonair Mega Shine Shiny Element Dragon Stage Stage 1 HP 80 Weakness none Retreat 1 Artist
I feel like this is one of the most well-realized precon decks ever out of the box, so you dont necessarily need to change 30% of the cards straight away even if I told you to jam a few games, talk with your group about the power level you want, and then decide where you want to land on the scale between AFR Set Constructed Venture Tribal and Legacy Reanimator Combo
The Sphere Grid enchantment rewards creatures you control +1/+1 counters whenever they deal combat damage, and in addition, any creature you control with a +1/+1 counter has Reach/Trample, making it even more dangerous to fight you