Read your game state because chances are the more powerful thing to do is replay lands, but self-milling and milling are bread and butter for some Sultai commanders, or it's own flat out win condition
I know you all love the feeling of throwing that heal instant card on top of a lightning bolt for the win, but trust me, it rarely happens like that and you're more likely to have that 5 mana cost healing spell in your opening hand or even mid game where it might as well read "gain 5 life, end the turn and lose control of the game"
A well-timed Rivers Rebuke can achieve a similar result against the most threatening player for a fraction of the price.
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Its a fun combo, particularly for the NOEX community battles
Games should be fun, and there's something to be said for Pokmon Pocket's decision to divorce earning cards from playing matches