If your spidey-senses are tingling that someone is holding up a counterspell for your Dinosaur silver bullet, go ahead and tutor up Tyrranax Rex to cast, and youll know whom to attack
If you really want to go all out here you could pick up all 3 for a nice display
Suddenly [card]Solemn Simulacrum can enter the battlefield with flash, ramp you twice, block, and draw two cards
It can be a good gateway to the Commander format if they want to focus a deck around a specific legendary card
I unfortunately have not been able to play very much EDH as of late, (and admittedly my playgroup was getting a bit burnt out on Anikthea!), so I've added your suggestions to the Maybeboard for now
Would you rather play a cantrip right before you take your turn or leave no mana up because you cast a Network Terminal