If Furious Forebear dies at the same time as one or more creatures you control, its ability won't trigger
Ways to search for, discount, recur, copy, and generally synergize with creature cards are just much more commonplace, and even more efficient, than equivalent options for other card types
It's more of a cantrip than a true card draw spell, since it only draws one card per instance of casting Top, but it also redraws itself pretty easily
While I wish the SIR hit rate was increased further (to hopefully make stock more available to collectors as opposed to scalpers), the multiple IRs I've pulled across these three standard sets have been much better than my experience with - shudders - Prismatic Evolutions or the like
If you're playing with dungeons, just keep them with your sideboard until you need them
His real personality is unknown because he was a person with a slightly crooked personality at the time, but Dorbe, who values friendship and companionship, comes to rescue him during the war