Reborn Hero 

Creature — Human Soldier
Vigilance
Threshold — As long as there are seven or more cards in your graveyard, this creature has "When this creature dies, you may pay {W}{W}. If you do, return this card to the battlefield under your control."
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Cards that do something similar expected a card that isn't here?
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Breathkeeper Seraph 89%
$1.66#8084
"As long as this card is paired with another creature, each of those creatures has "When this creature dies, you may return it to the battlefield under its owner's control at the beginning of your next upkeep.""
Tenacious Dead 87%
$0.31#13188
"When this creature dies, you may pay {1}{B}. If you do, return it to the battlefield tapped under its owner's control."
Nine-Lives Familiar 84%
$1.76#2543
"When this creature dies, if it had a revival counter on it, return it to the battlefield with one fewer revival counter on it at the beginning of the next end step."
Wave of Rats 81%
$3.06#9049
"When this creature dies, if it dealt combat damage to a player this turn, return it to the battlefield under its owner's control."
Liberated Livestock 81%
$0.31#17456
"When this creature dies, create a 1/1 white Cat creature token with lifelink, a 1/1 white Bird creature token with flying, and a 2/4 white Ox creature token. For each of those tokens, you may put an Aura card from your hand and/or graveyard onto the battlefield attached to it."
Phytotitan 81%
$0.76#8850
"When this creature dies, return it to the battlefield tapped under its owner's control at the beginning of their next upkeep."
Otherworldly Escort 80%
$0.16#19257
"When this creature dies, if it's not a Spirit, return it to the battlefield under its owner's control with four charge counters on it. It's a Spirit Detective."
Seraph 80%
#27854
"Whenever a creature dealt damage by this creature this turn dies, put that card onto the battlefield under your control at the beginning of the next end step. Sacrifice the creature when you lose control of this creature."