If you have foil cards and love seeing them shine, I recommend Dragon Shield sleeves
On the other hand, cards that you can cast for a reduced cost like Leyline Binding or Myr Enforcer are a nombo with increment, because youll actually pay a lower cost than the spells mana value
They all tend to play with the graveyard or your life total in some way, encouraging sacrifice, self-mill, and recursion to a big degree
This usually wont come up, but its entirely possible that your opponent might have an Ornithopter of Paradise in play
Ill lump together the cards that are incredibly similar for the sake of being concise
Setting up entire combos around creatures leaving and re-entering might sound a bit pointless until you remember the myriad enter the battlefield (ETB) triggers found in a huge number of creatures