Double your life for 2 mana

[Temur_Tendency]

{deadeye navigator} soulbond with {serra avatar} whilst {trostani, selesnyas voice} is out

[Munchlax]

That's waaaaaay more than two mana.
However it does sieve your life total so there's that

[DrainCleaner]

That's waaaaaay more than two mana.
However it does sieve your life total so there's that

Once these are in play, it costs 2 mana to double your life is what he's getting at.

[particle]

wait {deadeye navigator} is a combo card? i would have never guessed it.

[Destore117]

Selesnya voice + Serra whatsit +  {Cloudshift} ._. Same thing?

[Temur_Tendency]

Selesnya voice + Serra whatsit +  {Cloudshift} ._. Same thing?

Cant do it multiple times but

[Remillo]

If you want to {Cackling Counterpart} your Avatar and then Populate it with Trostani, that also works.