If Venser's triggered ability targets a spell cast with flashback, that spell will be exiled instead of returning to its owner's hand
Due to its aggressive nature, Rakdos often applies this strategy, since discard is usually a black thing in MTG
Thats not surprising, given how easy it makes it for equipping other creatures you might have in play on the field
As for Tiduss card, it can create a slowly expanding counter-based growth each turn
You want to attack with Squall alone, then use its damage trigger to recur two permanents (or the same permanent twice, if you can sacrifice it between triggers)
The crucial thing to remember about the spell-cheating element of Buster Swords trigger is the mana value limit is dictated by combat damage dealt to a player, not their creatures