(2024-06-07) Energy counters aren't mana
Making lots of money on the collectable side is fine, but there comes with it a responsibility to reinvest in the core parts of the actual game the collectable is based on
The first is that it enters the battlefield untapped, letting you use it right away, such that it only costs a virtual one mana to deploy provided you can make use of the mana it provides immediately
Here are some good Nethroi targets that have low power but make tokens or have good effects when they enter: Biogenic Ooze Blade Splicer Master Splicer Maul Splicer Sensor Splicer Noosegraf Mob Chittering Witch Creakwood Liege Akroan Horse Pentavus Deep Forest Hermit Deranged Hermit Nut Collector Duplicant Geist-Honored Monk Ghave, Guru of Spores God-Eternal Oketra Hornet Queen Izoni, Thousand-Eyed Tendershoot Dryad Trostani Discordant Trostani's Summoner Most of the above cards create creature tokens, so you'll probably want the usual: Doubling Season, Anointed Procession, Parallel Lives if you include a lot of them
The ability also triggers if our opponent targets it with a spell, which makes it somewhat resilient to removal
It's this simplified card structure that makes the deck great for beginners, but there's still a nuance to aggro decks that means you can't just blow all your creatures and spells carelessly and expect to win every match and reach mythic in MTG Arena ranked play