Sun-Blessed Guardian // Furnace-Blessed Conqueror
Creature — Human Cleric // Creature — Phyrexian Cleric
{5}{R/P}: Transform this creature. Activate only as a sorcery. ({R/P} can be paid with either {R} or 2 life.)
Whenever this creature attacks, create a tapped and attacking token that's a copy of it. Put a +1/+1 counter on that token for each +1/+1 counter on this creature. Sacrifice that token at the beginning of the next end step.
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Cards that do something similar expected a card that isn't here?
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Bonded Herdbeast // Plated Kilnbeast 100%
$0.11#25768
"{4}{R/P}: Transform this creature. Activate only as a sorcery."
Captive Weird // Compleated Conjurer 100%
$0.15#25821
"{3}{R/P}: Transform this creature. Activate only as a sorcery."
Gnoll Hunter 85%
$0.12#22961
"Whenever this creature attacks, if you attacked with creatures with total power 6 or greater this combat, put a +1/+1 counter on this creature."
Beetle-Headed Merchants 84%
$0.08#18877
"Whenever this creature attacks, you may sacrifice another creature or artifact. If you do, draw a card and put a +1/+1 counter on this creature."
Oran-Rief Ooze 83%
$0.26#8026
"Whenever this creature attacks, put a +1/+1 counter on each attacking creature with a +1/+1 counter on it."
Resplendent Griffin 82%
$0.09#28236
"Whenever this creature attacks, if you have the city's blessing, put a +1/+1 counter on it."
Fangren Firstborn 81%
$2.46#15366
"Whenever this creature attacks, put a +1/+1 counter on each attacking creature."
Rubblebelt Raiders 81%
$0.13#17880
"Whenever this creature attacks, put a +1/+1 counter on it for each attacking creature you control."
High-Society Hunter 80%
$0.32#4502
"Whenever this creature attacks, you may sacrifice another creature. If you do, put a +1/+1 counter on this creature."
Mardu Siegebreaker 80%
$0.46#3889
"Whenever this creature attacks, for each opponent, create a tapped token that's a copy of the exiled card attacking that opponent. At the beginning of your next end step, sacrifice those tokens."
Mirror-Style Master 80%
$0.27#12093
"Whenever this creature attacks, for each attacking modified creature you control, create a tapped and attacking token that's a copy of that creature. Exile those tokens at end of combat."