Anthems, or spells that provide passive power and toughness while a permanent or emblem persists, arent included
Here I'll give you a few examples for both of different power levels: Enablers Lifegain is everywhere and finding cards that do it and fit into your environment is easy
If you wanted extra cards playing mono green there were usually drawbacks like needing an artifact that benefited all players, such as Howling Mine
Of course, the Dragon gets exiled afterwards, but is a small price to pay in order to summon a massive winged beastie to fly straight at your opponents dome
If you do, when this creature enters, create a 1/1 token copy of it.) When this creature enters, target opponent loses 3 life unless they sacrifice a nonland permanent or discard a card
The equipped creature gets +1/+1 for each creature we control with base power or toughness of 1, and whenever a Hamster, Mouse, Rat, or Squirrel enters we can equip the Sword for free