If your commander has haste, youll often be able to equip it and attack in the same turn
This has the same strengths as Underground River except you only pay 2 life once as it enters
Even in the context of this precon, he is a great attacker who has some upsides if you can summon a few demons to help your cause
Bumbleflower, its nice to receive the occasional gifts for doing basically nothing, even if you have to view Bumbleflower as a threat at basically all times
More land drops = more landfall triggers from cards like Lotus Cobra, Felidar Retreat, and Scute Swarm
Vivien Reid shines in grindy matchups, where she can remove key threats like Unholy Annex, Archfiend of the Dross, Overlord of the Hauntwoods, Deep-Cavern Bat, and Caretaker's Talent while leaving behind a formidable planeswalker