Finally, we have one copy of Mentor's Guidance, which is basically two Opts for three mana, as long as we have one of our magecraft creatures on the battlefield
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We see this even on modern Pokemon cards as well, since holofoil sheets might not span the whole sheet and need to be tiled: image19202553 349 KB (Thanks @queendrifloon for this example of a holofoil edge) Why is this relevant
For example, your Blood Artist will drain an opponent for 2 each time a creature dies
With powerful payoffs that can burn your opponent out or generate a bunch of tokens, you can find plenty of reasons to fill your deck with these cards
The thing is, mana value three or less is much too narrow in casual metas