Defender (This creature can't attack.)
, Sacrifice a Wall: Draw a card.

When War Elemental enters the battlefield, sacrifice it unless an opponent was dealt damage this turn.
Whenever an opponent is dealt damage, put that many +1/+1 counters on War Elemental.

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)
Change the text of target permanent by replacing all instances of one color word with another or one basic land type with another until end of turn. (For example, you may change "nonred creature" to "nongreen creature" or "plainswalk" to "swampwalk.")

, : Put a charge counter on White Mana Battery.
, Remove any number of charge counters from White Mana Battery: Add , then add an additional for each charge counter removed this way.

Discard a card: Wild Mongrel gets +1/+1 and becomes the color of your choice until end of turn.

Trample
Wilderness Elemental's power is equal to the number of nonbasic lands your opponents control.

, Pay 1 life, Sacrifice Windswept Heath: Search your library for a Forest or Plains card, put it onto the battlefield, then shuffle your library.

All Sliver creatures have flying.

: Add .
, : Untap target Elf.

: Add .
: Add or . Yavimaya Coast deals 1 damage to you.