Things like Forced Fruition and Seizan, Perverter of Truth are awesome because they give opponents something at a cost
Cards like Goblin Bombardment, Warleader's Call, Ramunap Ruins, or creatures that can do burn damage like Guttersnipe or Mayhem Devil can be super important parts of burn strategies, but the goal here is to look to instants or sorceries or permanents that ETB with damage
Obviously better cards rank higher than not as good cards
Trading has become one of my favorite to enjoy Magic as it has all of the personality and peer to peer engagement of playing the game, but you'll end up being more "rewarded" than you would playing
It lets you draw and discard a card whenever one or more Knights attack, regardless of if Sidar is in the command zone or on the battlefield
Surgical Suite // Hospital Room The Surgical Suite side mirrors the current expected cost using such effects, so it alone already works as an alternative