Retreat to Hagra [Battle for Zendikar] Elemental Beast Set: Magic Ruler Card type:

Set: Magic Ruler Card type: Field Spell Rarity: Common Attack: 0 Defense: 0 Increases the ATK of all WATER monsters by 500 points and decreases their DEF by 400 points

At the beginning of your end step

it gets +1/+1 and has lifelink

then you can add 1 "Rainbow Dragon" or "Rainbow Dark Dragon" from your Deck to your hand

Retreat to Hagra [Battle for Zendikar] Elemental Beast Set: Magic Ruler Card type:Set: Battle for Zendikar Type: Enchantment Rarity: Uncommon Cost: {2}{B} Landfall Whenever a land enters the battlefield under your control, choose one Target creature gets +1 +0 and gains deathtouch until end of turn. Each opponent loses 1 life and you gain 1 life.