The combination struggles against sacrifice effects, mass removal, and decks that go over the top with even bigger threats
Horned Loch-Whale While certainly not a format staple, the Horned Loch-Whale is a powerful option for control decks and a key part of Greg Oranges Worlds Top 8 Bant Control Deck
Act of Aggression is technically CMC 5, but in reality, it is a colorless CMC 3 instant that does 4 damage to you, pay or to prevent 2 or 4 damage
Another popular condition often used is Pack Fresh, this basically means that the card is completely clean of whitening or any other defect and is in a condition above the Mint state, often in the condition for a PSA/CGC/BGS Gem Mint 10.
Just as with most iconography from the series, you cant have a Final Fantasy without an Ultima in some form or fashion
If you cast a spell for which mana of any color can be spent to cast it, you may cast it for Fist of Suns's alternative cost and still spend any color of mana to cover that cost