To form a proper judgment about a card, a lot of time is required to see how it performs and adapts to multiple different scenarios
Dawson Puzzling Sleuth would be great for filtering
[c]Solitude[/c] can remove an opponents creature (sometimes without even paying mana!) and [c]Snapcaster Mage[/c] lets you reuse a spell from your graveyard, whether thats a removal spell, counterspell, or board wipe
In this case, it is Squirreled Away, Animated Army, Peace Offering, and Family Matters
Helping your opponents may not seem like a winning strategy, but more often than not, youre getting more out of the deal than they are
Shrine of the Forsaken Gods fits perfectly, and you can even run Cloudpost and Glimmerpost or the Tron lands to great effect