Creature Visibility bug
Bug reproduction:
BattleField state:
P1 has: "Underworld Sentinel" (That has exiled" Dreamtail Heron")
P2 has: Flipped "Kumano faces Kakkazan" -> "Etching of Kumano", "Raiyuu, Storm's Edge" and "Asari Captain"
Gameplay:
P2: Attacks with "Asari captain" and gets "Raiyuu, Storm's Edge" extra combat and "Asari Captain" buffs.
P1: Blocks "Asari Captain" with "Underworld Sentinel" and Casts "Rookie mistake" on "Underworld Sentinel" and "Asari captain" -> "Asari captain" dies on combat damage.
P2: Attacks with "Etching of Kumano"
P2: Casts "Sacred Fire" with Flashback targeting "Underworld Sentinel"
P1: Casts "Eliminate" on "Etching of Kumano"
P2: Casts "Play with Fire" targeting "Underworld Sentinel"
Play with Fire resolves leaving Underworld Sentinel at 2 "life" Eliminate resolves killing Etching of Kumano, and Sacred Fire resolves killing Underworld Sentinel.
---Bug Time---
When Underworld Sentinel dies, it returns Dreamtale Heron back from exile.
P1 can see that, but P2 does not see Dreamtale Heron nor can target it. Dreamtale Heron can block attack and function as normal, but any damage it does P2 sees at the end of turn.
When P2 attacks and P1 blocks with Dreamtale Heron the blockking Dreamtale heron seems to be in graveyard.
All the pictures are from after the bug has happened and is written text is written out of memory.
Both Players are playing on PC and MTG Arena is Downloaded with Steam.