Considering extra combat steps are usually a lot more expensive than this, its no wonder that Grim Reapers Sprint is so popular
Pitiless Plunderer needs your board to die to make treasures, and its the same with most of the other sources of bursty mana generation in the color pair
Any other possibilities they could have explored
Legendary Creature - Demon Bird Color tag templates(None) Falcon and Redwing Flying Whenever Falcon and Redwing deal combat damage to a player, create that many 1/1 white Bird creature tokens with flying, then put a +1/+1 counter on Falcon and Redwing
After the attack ends, can I use this card's [End of Your Turn] effect to attack again
This could lead you to the question, Are they worth it? Conveniently, this is whats coming up next