Basim Ibn Ishaq cant be blocked this turn
According to the lore text at the bottom of the card, the creatures are trapped on a rock (possibly an asteroid.) Someone left behind an encrypted log recording the existence of slivers, either an unlucky explorer or, perhaps, a scientist involved in experimenting with the creatures, which would be a nice callback to the Riptide Project
If you feel the deck needs more sacrifice outlets, Vraska, Golgari Queen is a fantastic planeswalker that would love to eat a Squirrel or three
The ETB damage keeps early boards under control, and if you cast it normally, youre left with a double strike creature that closes games quickly
Just as the design of the card can change over time, so too can the art description
I adore this card in my deck, and especially because its only five mana for me