Based on the latest market prices tracked on TCG Stacked, Soul of Zendikar is worth about $0.47 USD
Most item packaging is in standard grade condition, meaning 80% mint (C8) or better, unless described otherwise
For example, say a player casts Croaking Counterpart (a sorcery that says "Create a token that's a copy of target non-Frog creature, except it's a 1/1 green Frog.") targeting Goblin Glasswright
Casting Abolisher on turn two is likely to anger the entire table, even players who aren't necessarily trying to operate at instant speed
You cant sacrifice the same Clue both to draw a card and to pay the cost of another ability (like Lonis, Cryptozoologists, which lets you sac clues to steal cards from your opponent)
So many of the aggressive decks contain haste dorks and proactive precombat things that it is super easy to get value from the card early