Good-Fortune Unicorn provides blanket +1/+1 counters to everything[/card], and Grumgully, the Generous does the same for non-humans
For the most part, these sieges basically replace themselves when they enter the battlefield, either by putting a new card in the players hand or creating an extra permanent in play
Theres a few other notable cards, like Recurring Nightmare and Mind Over Matter, but the value drops off steeply after that
We were fresh from the game store running a copy of FINAL FANTASY X on our brand-new PlayStation 2
My way of thinking is that Talrand, Sky Summoner always does work in a deck like this, but Impact Tremors, Witty Roastmaster, and Purphoros, God of the Forge only do work if you have another token-making creature out, and that just seems too fiddly and fragile
Give me an effect that feels like all three abilities here