Naga Eternal

Put a +1/+1 counter on target creature you control. Then that creature deals damage equal to its power to target creature or planeswalker you don't control.

(T: Add G.)

When Tolsimir enters, create Voja, Friend to Elves, a legendary 3/3 green and white Wolf creature token. Whenever a Wolf you control enters, you gain 3 life and that creature fights up to one target creature you don't control.

Spells your opponents cast cost 2 more to cast. At the beginning of your end step, each opponent loses 1 life.

Exile target permanent you control. Return that card to the battlefield under its owner's control at the beginning of the next end step. If it enters as a creature, it enters with an additional +1/+1 counter on it.

Whenever a creature you control with deathtouch deals damage to a player or planeswalker, put a +1/+1 counter on that creature. −2: Create a 1/1 black Assassin creature token with deathtouch and "Whenever this token deals damage to a planeswalker, destroy that planeswalker."

When this creature enters, you gain 3 life. T: Add one mana of any color.

Whenever you attack with two or more non-Gideon creatures, put a +1/+1 counter on each of those creatures. +2: Until end of turn, Gideon becomes a 5/5 white Soldier creature that's still a planeswalker. Prevent all damage that would be dealt to him this turn. (He can't attack if he was cast this turn.) −9: Exile Gideon and each creature your opponents control.