Youthful Valkyrie

Flying
Whenever another Angel you control enters, put a +1/+1 counter on this creature.

Marble Diamond

Marble Diamond enters tapped.
{T}: Add {W}.

{T}: Add {C}.
{T}: Add {R} or {W}. Talisman of Conviction deals 1 damage to you.

Flash
If a source would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

Choose target creature. Whenever that creature is dealt damage this turn, it deals that much damage to each other creature and each player.

Indestructible (Effects that say "destroy" don't destroy this artifact.)
{T}: Add one mana of any color.

At the beginning of your upkeep, draw a card.
{T}: Staff of Nin deals 1 damage to any target.

If a source you control would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

Flying
Landfall — Whenever a land you control enters, you may create a 1/1 white Bird creature token with flying.