The Level 3 "Burning Abyss" monsters destroy themselves if their controller controls a non-"Burning Abyss" monster, so your opponent might disrupt you with cards/effects that give you monsters, such as "Ojama Trio", "Santa Claws", "Creature Swap", "Flying "C"", etc., although "Libic" and "Farfa" can help maneuver around such strategies
Ruff life
What are the weaknesses and retreat cost of this Gastly card
Beyond the usual suspects of land destruction (Field of Ruin), there are a few Dragon utility cards (pictured above) that would give us some flexibility and insulation from mana flood
Der hatte jedenfalls keinen Widerstand geleistet
These include tournament entry or placement rewards, Buy-a-Box promos, book or comic promos, and Judge promos, to name a few