Twin Terror of Destruction - Tiras, Keeper of Genesis & Adreus, Keeper of Armageddon

Tiras, Keeper of Genesis

LIGHT/Fairy - Xyz - Effect/5/2600/1700

2 Level 5 monsters

If this card has an Xyz Material Monster, this card cannot be destroyed by card effects. If this card battles, at the end of Battle Phase, target 1 card your opponent controls and destroy the target. During each of your End Phases, detach 1 Xyz Material Monster from this card.

Adreus, Keeper of Armageddon

DARK/Fiend - Xyz - Effect/5/2600/1700

2 Level 5 monsters

Once per turn, you can detach 1 Xyz Material Monster from this card to target 1 face-up monster your opponent controls and destroy the target.

At the first glance, Tiras seems obviously better, and effect-wise, it is. However, Adreus makes himself better by its Type and Attributed. Adreus is a perfect Xyz for Dark World. Can be easily summoned through the combo of Goldd + Siilva, fuels the Graveyard for Gate of the Dark World, gets rid of stuff and if Adreus itself dies, it is a fooder for Gate as well. It's generic as well, so it can fit pretty much everywhere.

On the other hand, Tiras is much better in non-Dark World decks. Immune to destruction effects for 2 turns since summon, and destroys 1 card each turn. However, it must still go through the Battle Phase to actually work, so Dimensional Prison and stuff simply screw him over, where Adreas' effect is instant use. Though Tiras had Honest, and is a fooder for Archlord Kristya when dies. Generic as well.

While on the first hand Tiras seems much better than Adreus, in reality, they're equally awesome. Honestly, I expected that TCG Exclusives for GENF will suck, but Adreus thinks otherwise. Orient Dragon is pretty good card too, I will review it later today or tomorrow. Anyways, so far, GENF looks very promising, I wonder what more will we get in it.