Its actually a superb upgrade and one of the best picks from this set of Promos
If the cards people like most are those that are top down rather than bottom up then perhaps it is a good idea to design a cube with that method taking the lead
If you don't care about life at all you are likely a super aggressive deck, likely red, or some kind of a combo deck and you should consider playing Searing Spear instead of Lightning Helix as it will increase your consistency
Unlocking the second half of a Room doesn't affect the half that's already unlocked
Stellar Crown Squirtle SIR #148 80 raw 50% ROI Water illustration rare Kanto starter + Terastal art = 120 by 2026
A card reprinted in multiple sets, or with new art, new card frames, new flavor text all of these are examples of a gameplay design, game balance, or artistic design decision