Full Grip Games is another reliable option, particularly if you have bulk from older sets
After that, start trying to get some token generators on the battlefield so you have fresh bodies each turn (or a ton all at once) that can be sacrifice fodder
The first ability is solid and can get you an extra mana
Competitively, Blastoises extremely strong Pokemon Power: Rain Dance ability allowed you to toss down unlimited water energy cards to as many different water-type Pokemon as they wanted during their turn
As we discuss below, one of the key distinguishers of shadowless booster packs is that Trading Card Game logo is at the bottom (compared to the top for unlimited packs)
Card Text: Flying, trample Whenever one or more opponents each lose exactly 1 life, put a +1/+1 counter on Ob Nixilis, Captive Kingpin