The power of card-draw and Energy acceleration to fuel these expensive attacks is what determines their viability, not the attack effects power on its own
These reactions can be reacted to, and so forth, and nothing happens until both players have finished taking actions
However, the set ended up being a huge win for everyone, and it even included one of the cutest Manga Rare cards. Tony Tony Chopper was the third Straw Hat Pirate to get his Manga Rare card and it was well-deserved as he looks downright adorable
This means you're free to go all-out on your turn, attack and tap every creature and bit of land you have, safe in the knowledge a few minutes later you'll reset and have all those resources available for casting instants and blocking
The Swarmlord
Any other shrines buff this into ranges that manage to keep you alive and kill your opponent at the same time, and the clock it provides gets you over the line a lot faster than your opponent probably realizes