If a non-Human creature enters the battlefield as a copy of a Human creature, it won't get a +1/+1 counter
Does this mean that you just have to get lucky and pack the cards you need
And as someone who has cast Boom // Bust on a Darksteel Citadel plenty of times, there are a lot of options to choose from
SOK Saviors of Kamigawa 67 - Uncommon - English EN Card Name Mana Cost Type Sorcery Rarity Uncommon rules Text Target player sacrifices a creature of their choice with mana value 3 or less.At the beginning of your upkeep, if you have more cards in hand than each opponent, you may return this card from your graveyard to your hand
Sylvan Library (green, 2 mana): Three cards per turn, with a life-payment trade-off
The One Ring is still that good, and you can get it in a normal, cheaper version if you want it