As design philosophy has changed and they have added more value to cards (including lands), card advantage has become less of a constraint, and being constrained as mana has become the games core constraint
Altar of Dementia Theres that Altar word again, and this isnt even one of the best ones
If that player declines to have you draw, you may play a creature with a lesser or equal toughness directly from your hand without paying its mana cost
Lastly, you can see just how thick the in-play Abaddon Commander card really is
This unlikely hero had found himself as the primary source of card draw for amber-based aggro decks

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