Dyadrine, Synthesis Amalgam {X}{G}{W}
Legendary Artifact Creature — Construct
Trample
Dyadrine enters with a number of +1/+1 counters on it equal to the amount of mana spent to cast it.
Whenever you attack, you may remove a +1/+1 counter from each of two creatures you control. If you do, draw a card and create a 2/2 colorless Robot artifact creature token.
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Cards that do something similar expected a card that isn't here?
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Gyrus, Waker of Corpses 100%
#18297
"this card enters with a number of +1/+1 counters on it equal to the amount of mana spent to cast it."
Kurbis, Harvest Celebrant 100%
$0.46#10408
"this card enters with a number of +1/+1 counters on it equal to the amount of mana spent to cast it."
Marath, Will of the Wild 100%
$0.70#15268
"this card enters with a number of +1/+1 counters on it equal to the amount of mana spent to cast it."
Gideon, the Oathsworn 86%
#17669
"Whenever you attack with two or more non-this card creatures, put a +1/+1 counter on each of those creatures."
Andúril, Narsil Reforged 82%
$16.59#2688
"Whenever equipped creature attacks, put a +1/+1 counter on each creature you control. If you have the city's blessing, put two +1/+1 counters on each creature you control instead."
Captain America, Skybound 81%
$2.99#20362
"Whenever this card and at least two other creatures attack, put a +1/+1 counter on each attacking creature. They gain indestructible until end of turn."