Obviously, the card's superb as a top-end in any white token deck, but it's particularly great in dragon decks too
Torment of Hailfire also does the trick if you pay enough mana or if your opponents are too low on life to risk losing any more
you are simply encouraging everyone to make better choices, like attacking literally anyone else
Defiant Strike occasionally sees play in decks that just need targeting spells, and while Honor is a sorcery, a +1/+1 counter is a pretty good output on a 1-mana cantrip
This list is your typical run-of-the-mill 5-color-good-stuff list with Kenrith
In summary, I think Sefris is a one-note commander, but one that can lead to a fun reanimator deck if you combine her with enough other Venture cards and payoffs to make all the hoops youre jumping through worthwhile