mtg.wtf

All creatures get -3/-3 until end of turn.
You may cast a spell with mana value 3 or less from your hand without paying its mana cost.

Haste
Whenever a creature an opponent controls dies, put a +1/+1 counter on Yahenni, Undying Partisan.
Sacrifice another creature: Yahenni gains indestructible until end of turn.

Flying
When Yanling's Harbinger enters, you may search your library and/or graveyard for a card named Mu Yanling, Celestial Wind, reveal it, and put it into your hand. If you search your library this way, shuffle.

Target creature defending player controls gets +3/+0 until end of turn. That creature can block up to two additional creatures this turn.

When Yarok's Wavecrasher enters, return another creature you control to its owner's hand.

{G}: Yavimaya Ancients gets +1/-2 until end of turn.

Trample, haste
Cumulative upkeep {G}{G}

Protection from blue

{T}: Add {C}.
{T}: Add {G} or {U}. Yavimaya Coast deals 1 damage to you.

Forestwalk
When Yavimaya Dryad enters, you may search your library for a Forest card, put it onto the battlefield tapped under target player's control, then shuffle.

When Yavimaya Elder dies, you may search your library for up to two basic land cards, reveal them, put them into your hand, then shuffle.
{2}, Sacrifice Yavimaya Elder: Draw a card.

Yavimaya Enchantress gets +1/+1 for each enchantment on the battlefield.

Flying
{G}: Regenerate Yavimaya Gnats.

Echo {2}{G}
When Yavimaya Granger enters, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

When Yavimaya Sapherd enters, create a 1/1 green Saproling creature token.

Protection from artifacts

Trample

Enchant creature
You control enchanted creature.
Enchanted creature gets +2/+2 and has trample.

Flying
First strike
At the beginning of your upkeep, you may sacrifice an artifact. If you don't, tap Yawgmoth Demon and it deals 2 damage to you.

{TK}{TK} — When this permanent leaves the battlefield, target player discards a card.
{TK}{TK}{TK}{TK}{TK} — When this permanent leaves the battlefield, create five 1/1 white Clown Robot artifact creature tokens.
{TK}{TK} — 3/3
{TK}{TK}{TK}{TK} — 6/5

You can't cast more than one spell each turn.
You may play lands and cast spells from your graveyard.
If a card would be put into your graveyard from anywhere, exile it instead.

Skip your draw step.
Pay 1 life: Draw a card.

{T}, Pay 2 life: Add {B}{B}.
You may cast spells from your graveyard. Only mana produced by abilities that caused you to lose life may be spent to cast spells this way. (Damage causes loss of life.)
If a card would be put into your graveyard from anywhere, exile it instead.

Whenever an opponent casts a white spell, that player loses 1 life and you gain 1 life.