Arwen, Weaver of Hope {1}{G}{G}
Legendary Creature — Elf Noble
Each other creature you control enters with a number of additional +1/+1 counters on it equal to Arwen's toughness.
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Cards that do something similar expected a card that isn't here?
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Master Biomancer 98%
$0.77#3053
"Each other creature you control enters with a number of additional +1/+1 counters on it equal to this creature's power and as a Mutant in addition to its other types."
Renata, Called to the Hunt 94%
$0.22#2691
"Each other creature you control enters with an additional +1/+1 counter on it."
Tromell, Seymour's Butler 92%
$0.39#4237
"Each other nontoken creature you control enters with an additional +1/+1 counter on it."
Bloodspore Thrinax 91%
$0.32#8983
"Each other creature you control enters with an additional X +1/+1 counters on it, where X is the number of +1/+1 counters on this creature."
Metallic Mimic 87%
$0.45#1056
"Each other creature you control of the chosen type enters with an additional +1/+1 counter on it."
Grumgully, the Generous 86%
$0.27#4182
"Each other non-Human creature you control enters with an additional +1/+1 counter on it."
Celes, Rune Knight 83%
$1.56#5241
"Whenever one or more other creatures you control enter, if one or more of them entered from a graveyard or was cast from a graveyard, put a +1/+1 counter on each creature you control."
Kalain, Reclusive Painter 83%
$0.30#4588
"Other creatures you control enter with an additional +1/+1 counter on them for each mana from a Treasure spent to cast them."
Bramblewood Paragon 82%
$2.70#6934
"Each other Warrior creature you control enters with an additional +1/+1 counter on it."