With enough mana, that might be enough to do something with the one (or both) that goes back to your hand, like have an answer to a very tricky problemsuch as a Counterspell or a Fog
The preemptive semi-limitations of the two strongest cards should already convince you of that
But, you say, cant this delay be used against you by the opponent to gain knowledge about set cards? No, you can both suppress the (actual) prompt when you have something on the field, or open a fake prompt at all times
Card Name Mana Cost Type Sorcery Rarity Mythic Rare rules Text Take an extra turn after this one
And of course, if you lose, well, its back to the beginning for you
Finally, theres Teyo, Geometric Tactician