MTG Salvation

I’d say it’s better overall than penumbra spider, plus you can flicker it

The main thing this has over the Penumbras is the synergy with anthems, Cathars' Crusade, things like that, and ability to survive Wraths. Technically, the Penumbra tokens can also survive Terror and friends.

The downside is, Giant Spider, Penumbra Spider, and other 2/4 spiders can already block and kill any non-first-striking X/2 creature, and survive any non-double-striking 3/X creature. So they're slightly better at combat.

It's pretty different though. The Penumbra cards have a longer-term survivability. This thing, you do a board wipe and it's all gone. The Penumbra makes his shadow copy and you've still got a creature on the board.