Its because we know that, deep down, every device is the same
The only difference is that the indestructible creature doesnt die from the damage its dealt
The mana generation effect is also fantastic, and with cards like Umbra Mantle or anything that can untap, you can easily make infinite mana to play out your whole hand
Regardless, there are plenty of ways for Dimir to get you across the finish line
Loathsome Troll can be pesky and keep returning after it dies but it costs a total of nine mana to bring back, which will most likely be spent over multiple turns
As for gameplay, Venom lets you sacrifice cards to draw and play other spells, potentially shifting your board state pretty quickly