Another common technique is the riffle shuffle, where the deck is split into two halves and interleaved
From the pre-game discussion about power levels or possible strategies to acclimatize everyone to each other's decks to making sure one's deck doesn't monopolize time at the table, these "rules" are in place to make sure everyone has a good time
They have quite a bit of chance, which can drastically increase replayability as well as frustration
I mean, it's a weakness that a smart player like me *slicks my hair and winks* takes full advantage of in the mirror match, but it's also a weakness you need to be wary of and can actually mitigate entirely so long as you're a smart with when and how you use him
That mana doesnt go away until the end of combat, letting you use it on any instant-speed activated abilities or spells
Great for TCGs like MTG, Pokmon, Lorcana, Flesh and Blood