Because if they are just: Everyone gets a mana of their choice, everyone gains 3 life, and then their ultimate is everyone draws seven cards, then they may not be the most powerful cards ever
Another option is using something that can fill a party role and last through a board wipe think Bitterblossom, When building around Nalie, you will want to keep a high creature count to maximize your chance at reaching a full party but being able to search out the last party member you need is important and a card like Coveted Prize should certainly make the final cut
If even one opponent is open, you could easily burn out the other two, then swing in with an unstoppable Ob Nixilis to finish the job
A card with flash can be cast at any time you would use an instant
Elementals by Kanister 1 Endurance 3 Flamekin Harbinger 4 Fury 1 Mulldrifter 4 Omnath, Locus of Creation 4 Risen Reef 4 Solitude 4 Teferi, Time Raveler 1 Wrenn and Six 1 Breeding Pool 3 Cavern of Souls 1 Flooded Strand 2 Forest 1 Hallowed Fountain 3 Misty Rainforest 1 Plains 1 Raugrin Triome 1 Sacred Foundry 1 Stomping Ground 2 Temple Garden 4 Windswept Heath 1 Wooded Foothills 1 Yavimaya, Cradle of Growth Sideboard 3 Endurance 2 Engineered Explosives 4 Force of Negation 2 Force of Vigor 1 Foundation Breaker 1 Gaeas Blessing 1 Kaheera, the Orphanguard 1 Mulldrifter Elementals is a beefy midrange deck that aims to dominate the midgame
