The Gitrog, Ravenous Ride

Trample, haste
Whenever The Gitrog, Ravenous Ride deals combat damage to a player, you may sacrifice a creature that saddled it this turn. If you do, draw X cards, then put up to X land cards from your hand onto the battlefield tapped, where X is the sacrificed creature's power.
Saddle 1

践踏，敏捷
每当血口坐骑噬人蛙怪对任一牌手造成战斗伤害时，你可以牺牲一个本回合中乘驾它的生物。若你如此作，则你抓X张牌，然后将至多X张地牌从你手上横置放进战场，X为所牺牲生物的力量。
乘驾1