Universal Automaton

Changeling (This card is every creature type.)

Psychatog

Discard a card: This creature gets +1/+1 until end of turn.
Exile two cards from your graveyard: This creature gets +1/+1 until end of turn.

Changeling Outcast

Changeling (This card is every creature type.)
This creature can't block and can't be blocked.

Atogatog

Sacrifice an Atog creature: Atogatog gets +X/+X until end of turn, where X is the sacrificed creature's power.

Balancing Act

Each player chooses a number of permanents they control equal to the number of permanents controlled by the player who controls the fewest, then sacrifices the rest. Each player discards cards the same way.

Auratog

Sacrifice an enchantment: This creature gets +2/+2 until end of turn.

Sarcatog

Exile two cards from your graveyard: This creature gets +1/+1 until end of turn.
Sacrifice an artifact: This creature gets +1/+1 until end of turn.

Foratog

{G}, Sacrifice a Forest: This creature gets +2/+2 until end of turn.

Atog

Sacrifice an artifact: This creature gets +2/+2 until end of turn.

Plains

Lithatog

Sacrifice an artifact: This creature gets +1/+1 until end of turn.
Sacrifice a land: This creature gets +1/+1 until end of turn.

Chronatog

{0}: This creature gets +3/+3 until end of turn. You skip your next turn. Activate only once each turn.

Necratog

Exile the top creature card of your graveyard: this creature gets +2/+2 until end of turn.

Mutavault

{T}: Add {C}.
{1}: This land becomes a 2/2 creature with all creature types until end of turn. It's still a land.

Phantatog

Sacrifice an enchantment: This creature gets +1/+1 until end of turn.
Discard a card: This creature gets +1/+1 until end of turn.

Thaumatog

Sacrifice a land: This creature gets +1/+1 until end of turn.
Sacrifice an enchantment: This creature gets +1/+1 until end of turn.

Megatog

Sacrifice an artifact: This creature gets +3/+3 and gains trample until end of turn.