Were going to see Rakdos, the Muscle explode in any deck with any sort of sacrifice synergy
Its value has steadily increased since release
Too few lands and the player will have great hands full of spells but no land with which to bring them in to play (this is known as being "mana screwed") whilst too many lands means the player is able to play lots of spells but their chances of drawing them is lessened (this is known as being "mana flooded.") This is further compounded by the effectiveness (or power) of a card being designed to correlate with its mana cost (or how many lands must be used to cast the spell)
A 3/2 plus a 1/1 for 4 mana is fine, though usually you get a little more than that, like flying on one of them
1-3 Tropical Mega Battle promotional cards were structured very similarly to the trainer promos we described earlier, with the text personalized to show the winners name, region, and tournament placement
It can even investigate again by exiling creatures from your graveyard, giving you a backup plan when the board gets messy