Use the deck editor to craft new cards by collecting Trade Credits through play
Fell Specter The next few cards do the same thing: make opponents lose life when they discard cards
Golgari insects was already a well-supported Commander archetype led by Grist, the Hunger Tide and Zask, Skittering Swarmlord, so Seedship Broodtender would be right at home in those decks
If an Adventure spell leaves the stack in any way other than resolving (most likely by being countered or by failing to resolve because its targets have all become illegal), that card won't be exiled and the spell's controller won't be able to cast it as a creature later
Naturally, if you just want to open a new set for fun or want to gamble, thats cool
Once you've put the counters on it, people are gonna really think twice about attacking you