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That is some pretty insane value for only a single mana

Menace and a relatively affordable mana cost help a lot in this regard, but opponents will do well to keep up their defenses

One of the best examples is the Sabre Bargain deck Jon Finkel beat me playing to make the finals of the 2000 MTG Invitational in Kuala Lumpur

Slaughter Singer gives creatures with toxic +1/+1 when attacking, making them more likely to not die in combat since their base stats are quite weak

Nature's Chosen has some tryhard combos, but its mostly useful as a creature-untapper in decks that care about that in green like Emmara, Soul of the Accord

Hope that helps