Night of the Nullmoon, Duel of Titans etc

Click card names for images.

Ambush Assault XRR
Sorcery
Up to X target creatures can't block this turn. Put X 1/1 red Viashino creature tokens with haste into play. At end of turn, exile them.

Duel of Titans 3RR
Sorcery
target opponent may put a creature card from his or her hand into play, then you may put a craeture card from your hand into play. Each of those creatures deals damage equal to its power to the other.

Karxon, the Fallen Crusader 3B
Legendary Creature - Skeleton Knight
B, Sacrifice a creature: Regenerate ~.
Whenever ~ regenerates, put a 1/1 black Skeleton creature token with "B: Regenerate this creature" into play.
4/1

Night of the Nullmoon 3BB
Enchantment
Sacrifice a creature or discard a creature card: Choose one - Target creature gets +2/+2 until end of turn; or target creature gets -2/-2 until end of turn.

Primal Ancient G
Creature - Elf Shaman
Whenever an opponent plays a non-mana activated ability, you may put a +1/+1 counter on ~.
1/1

Pull From the Forge 3W
Sorcery
As an additional cost to cast ~, sacrifice an Equipment.
Search your library for an Equipment card and put it into play. Attach t to a creature you control. Then shuffle your library.

Runescale Dragon 3UUU
Creature - Dragon
Flying
If a creature you control would deal damage, prevent that damage. You draw cards equal to the damage prevented this way.
5/5

Siaak, Saurian Outcast 2GG
Planeswalker - Siaak
+1: Put a 0/1 green Bird creature token with flying into play.
+1: Until end of turn, creatures you control gain "T: Add one mana of any colour to your mana pool".
-6: Add twenty mana i nany combination of colours to your mana pool. This mana doesn't empty from your mana pool as steps or phases end.
{3}

Sire of the Deep 8UUU
Legendary Creature - Leviathan
Trample
Whenever ~ deals combat damage to a player, you may exile it. If you do, take an extra turn after this one. At the end of that turn, return ~ to play.
8/12

Winged Guardian 5WW
Creature - Avatar
Flying
Other creatures you control get +0/+10.
4/5

cool cards, I like the new planeswalker although isnt his -6 ability a little overpowered?

also arent you suppose to say like "put onto the battlefield" instead of "into play" like arent you a judge and correct other people with terminology ha

I don't think it's overpowered at all.

And yes, that is the correct wording, but I don't bother with it - all it does is take up valuable space.