magic the gathering mystery booster box convention edition Gathering: expansion symbol mtg mystery booster box 2

Borreload Savage Dragon is a level 8 synchro, making it pretty easy to summon

Dark Master - Zorc X DARK Level 8 [ Fiend / RitualEffect ] ATK 2700 DEF 1500 You can Ritual Summon this card with "Contract with the Dark Master"

The self-regeneration effect is the main thing that compensates for that, but this also requires the preparation of a separate quiller, and it is easy to countermeasures because there are plenty of removal methods other than destroying the current environment, GY meta cards

[When Attacking] Trash the top digivolution card of 1 of your opponent's Digimon

If your opponent still has over 20 cards after inferno tempest resolves you've already lost as this will empty your deck as well