Cost
Consume any 2 mana: summon.

Mandatory Once-per-turn Trigger
When summoned: Manalock target until end of turn.
Manalocked: [this] cannot consume its own mana or activate effects that cost mana for the duration.
If that card has an effect in this chain that would qualify, that effect fizzles.

Action
Target either (1) gains or (2) consumes 1 mana.