The mana could also go towards land destruction spells such as Acidic Slime, Reap and Sow, and Woodfall Primus, to prevent control decks from stopping Thrun with Iona, Shield of Emeria
Cryptic: While I don't have much to elaborate on the role of the named Tyranid human characters, I think the deck did a neat job translating Genestealer Cults into the card game and I wanted to make a few remarks about that
There are a lot of other permanents that give tokens a stat boost, so when all of these combine your tokens, even if they're 1/1s, they'll be threatening in combat
If that was a smaller mana cost, then you can scry 2
Cling to Dust Repeatable card draw is nice, especially if youre filling your graveyard anyway because youre one of a dozen black archetypes that wants to do that