mtg murders at karlov manor commander deck or casts their second spell each turn Murders At Karlov Manor Commander

It does tap itself for its effect so Collector's Vault only benefits once per turn unless you have ways to untap it before your normal untap step

For simplicity's sake, I'm representing these in a bullet-point format, but if you're looking for additional effects to round out your lists with some variety, you should consider some of these

I like pretty much everything about this deck

There are a couple of more tame effects (i.e., Crystal Fragments) that are technically DFCs though

Set : At this point youll want to check any cards that you have in play to see if they have effects that mention the beginning phase and activate them