Common Fiend monsters used include "Dark World" monsters, as well as Fiend Tokens like the ones summoned by "Phantom Skyblaster" or "Fires of Doomsday"
Romin, Luke and Gavin met Yuga, Roa and Nail in Goha Stadium and Luke and Yuga reaffirmed their convictions
Even if you think about it simply, this card gives you an additional action equal to the number of players x 3, so it can be said to be a fairly powerful effect
Now, things are different
usually a 38-12 split 10 sources of "card advantage;" I use this term loosely, but mostly looking for card draw or any spell that nets me 2+ nonland cards in hand / directly into play 6 targeted removal split between creature / artifact / enchantment removal 3 board wipes 2 recursion 2 flexible tutors 1 graveyard hate 1 surprise "I Win" card That's always my starting point, which is then tweaked to suit the individual deck's strategy, and further tweaked with playtesting