The key is to load the deck up with incremental life gain rather than single huge life gain effects since Blech's ability triggers once whenever you gain life and doesn't care how much life is gained
In most cases, the controller of the attacking creature will still become the monarch as it is likely their turn.
Each of the more recent generations have had different variants of the gold energies in their own style and so there are quite a few to collect now
Card Name Mana Cost Type Creature Human Wizard Rarity Rare rules Text , Sacrifice this creature: Counter target noncreature spell unless its controller pays .Disturb (You may cast this card from your graveyard transformed for its disturb cost.) P/T Number 61 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Timeless, Vintage Not Legal Formats Alchemy, Pauper, Standard Rulings (9/24/2021) Disturb is found only on the front faces of some double-faced cards