Tyranid Invasion is great early (since you usually have three opponents), Tyranid Prime is absolutely bonkers, one of the best cards in the deck, and Tyrant Guard is pretty good, offering protection to your board
Youll need to match the symbols of the attack cost to the Energy card, but any kind of Energy can be used for
The Crab first got the milling ability based on the logic I explained above in Drowner Initiate
3) Lock in the format constraints (so you stop accidentally cheating) This is the boring part that prevents the even more boring part where you rebuild your deck because one card is illegal
Normally, a downside to Auras in Voltron decks is that if the creature gets removed, the Aura doesn't stick around
Okay so this Plasma Caster might be true RNG outside a coin flip deck (a deck where itll be awesome), but I think you can generate some virtual card advantage by playing this thing anyways