Psychic Frog has a natural home in the most powerful environments, and is plenty solid as a standalone card for lower-power Cubes as well
Remember I suggested that you draft the cards before playing, not build your deck around it, so that you don't build a Pebbles deck to abuse this
You can lose a lot of life on an opponents turn when you might not be able to use the mana, and its limited by the number of creatures you can play
Which cards are the most valuable in each game and which game is the most affordable today are reasonable questions that one might ask when getting into both the act of playing the games as well as acquiring memorabilia
Later, a 4-mana investment gives you an Archaeomancer-like effect, so you can get whatever you need back
Based on some other tests I didn't photograph, it may work faster if the packs are along an edge of the card, but the difference in my tests was minor, at best