Elemental Bond is probably the one Id get first, because it can trigger off of tokens, has no restrictions to how often it can trigger, and gates the trigger at three rather than four
From here, there is a selection of card entry ways, for example top loading (cards are placed into the individual slots via the top) or side loading (cards are placed into the individual slots via the side)
Once you begin to cast a spell, losing control of Muldrotha won't affect the spell
Finally, if you want a solid one-play kill, hit them with a Peer Into the Abyss or a big Damnable Pact to take them out instantly
Firjas Retribution Sagas are my favorite card type in Magic , so you can imagine my delight when I started seeing all the Kaldheim spoilers over the past few weeks