Obsessive Pursuit 

Enchantment
$0.41 #5975 0.00 0.8 years
When this enchantment enters and at the beginning of your upkeep, you lose 1 life and create a Clue token. (It's an artifact with "
, Sacrifice this token: Draw a card.")
Whenever you attack, put X +1/+1 counters on target attacking creature, where X is the number of permanents you've sacrificed this turn. If X is three or more, that creature gains lifelink until end of turn.
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Cards similar to Obsessive Pursuit expected a card that isn't here?
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"
,
, Sacrifice another creature: You gain X life and put X +1/+1 counters on target creature you control, where X is the sacrificed creature's power."
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"At the beginning of your upkeep, you may pay 1 life. If you do, draw a card and put a +1/+1 counter on this card."